Search: “secure boot”

USN-8727-1: Linux kernel (OEM) vulnerabilities

Ubuntu issued kernel security update USN-8727-1 for OEM kernels, fixing an Arm TLB invalidation flaw (CVE-2025-10263) allowing local privilege escalation.

Ubuntu released USN-8727-1, a security update for the OEM variant of the Linux kernel. It fixes CVE-2025-10263, in which certain Arm processors complete broadcast TLB invalidation before related memory writes are globally observed, potentially letting local attackers bypass memory protections or escalate privileges. The notice also corrects additional kernel flaws across ARM64, ARM32, RISC-V, S390 and other subsystems.

Ubuntu Security Notices·updated Sep 7, 09:12 UTC · 9d ago·first Sep 7, 09:02 UTC · 9d agoAdvisory 6 sourcesCVE-2025-10263

Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability

Cisco disclosed a UEFI Secure Boot bypass in UCS servers and UCS-based appliances letting authenticated or physically present attackers execute unauthorized software.

Cisco published an advisory for a vulnerability in the UEFI Shell implementation of UCS servers and UCS-based appliances. Memory write commands remain available in the UEFI Shell while Secure Boot is enabled, allowing an attacker to modify UEFI memory and bypass validation checks to run unauthorized software. Exploitation requires either valid credentials for a user or admin account, or unauthenticated physical access to select the UEFI Shell boot option at boot time. The issue affects firmware boot integrity rather than the running operating system.

Cisco Security Advisories·Sep 8, 16:00 UTC · 8d agoAdvisory

TPMSpy: Validation of Measured Boot Systems by Low-Level Tracing of TPM Usage

Researchers present TPMSpy, a platform-agnostic method validating TPM Measured Boot via low-level tracing, finding inconsistent Linux systemd measurements that break remote attestation and LUKS decryption.

An arXiv paper (2609.05011) introduces TPMSpy, a method that analyzes virtualized system–TPM interactions to independently reconstruct and validate TPM Event Logs without relying on the quoting mechanism, applicable to open and closed systems and demonstrated on Linux and Windows. A longitudinal analysis of Linux systems running systemd versions 245–258 (2020–2025) found wide divergence in Measured Boot usage, undocumented behavioral changes, and no common usage pattern. The authors report inconsistent measurement of user-space systemd services, which prevents reliable remote attestation and LUKS disk decryption on affected systems.

arXiv cs.CR·Sep 4, 11:23 UTC · 12d agoResearch

Citrix UniconOS dual boot turns Windows endpoints into their own recovery device

Citrix released UniconOS dual boot in Release 7 2607, turning Windows endpoints into self-recovery devices after ransomware, failed updates or OS corruption.

Citrix announced dual boot in UniconOS Release 7 2607, which installs an isolated, hardened recovery environment alongside Windows in a separate partition protected by secure boot. If Windows is unavailable, users reboot into UniconOS and reconnect to applications via Citrix DaaS and SecurAccess with Chrome Enterprise. The capability is aimed at reducing reliance on spare hardware and central reimaging during ransomware or update failures, with automatic enrollment in UniconOS Management for fleet-wide boot policies.

Help Net Security·Aug 25, 00:00 UTC · 22d agoTools

USN-8730-2: Linux kernel (Azure) vulnerability

Ubuntu fixes a Linux kernel (Azure) vulnerability in the IPv6 networking and Netfilter subsystems.

Ubuntu security notice USN-8730-2 corrects a security issue in the Linux kernel Azure flavor affecting the IPv6 networking and Netfilter subsystems. An attacker could possibly use the flaw to compromise the system.

Ubuntu Security Notices·Sep 15, 09:41 UTC · 1d agoAdvisory 2 sources

VU#687587: AOMEI Backupper amwrtdrv.sys local privilege escalation vulnerability allows arbitrary writes to physical disks

AOMEI Backupper 8.4.0 driver flaw CVE-2026-12780 lets unprivileged users write physical disks and execute UEFI code, bypassing HVCI and EDR.

CERT/CC issued VU#687587 for CVE-2026-12780, an incorrect permission assignment (CWE-732) in the amwrtdrv.sys kernel driver shipped with AOMEI Backupper 8.4.0. The driver exposes a world-accessible device object without a security descriptor, allowing any unprivileged user to write arbitrary physical disk sectors; with Secure Boot disabled, an attacker can modify the GPT and inject a UEFI payload that executes before the OS loads, bypassing HVCI, EDR, Windows Defender and Hyper-V isolation. On TPM-only BitLocker configurations the attack can capture Volume Master Key material during pre-boot. AOMEI has shipped patches; users who cannot update should uninstall the software or disable the amwrtdrv.sys service, and enabling Secure Boot adds defense in depth.

CERT/CC Vulnerability Notes·Sep 10, 17:46 UTC · 6d agoVulnerabilityCVE-2026-127801

VU#718077: UEFI Shell module embedded in SPI Flash can be used to bypass Secure Boot

CERT/CC details VU#718077: UEFI Shell embedded in SPI flash lets attackers bypass Secure Boot and execute pre-boot code; patches issued.

CERT/CC's VU#718077, reported by Eclypsium researcher Stas Lyakhov, describes how a UEFI Shell embedded in SPI flash can be abused by attackers who can modify UEFI boot configuration, creating multiple boot entries that bypass controls preventing the Shell from launching under Secure Boot. The Shell's dmem and mm commands allow arbitrary physical memory read/write, letting attackers overwrite Secure Boot values and execute unauthorized pre-boot code that can persist across reboots and OS reinstalls while degrading EDR effectiveness. AMI confirmed its Aptio UEFI BDS module is affected (CVE-2026-33197), and Cisco published an advisory for a variation affecting UCS Servers and UCS-based appliances (CVE-2026-20293). Firmware patches are being rolled out through OEM and IBV BIOS build pipelines.

CERT/CC Vulnerability Notes·Sep 8, 15:05 UTC · 8d agoVulnerabilityCVE-2026-20293CVE-2026-33197CVE-2026-6485

Debian 13.7 ships the fixes behind 92 security advisories, updates 106 packages

Debian 13.7 'trixie' point release bundles 92 security advisories and 106 package updates, including kernel, glibc, u-boot and qemu fixes.

Debian shipped version 13.7 of 'trixie', folding in 92 previously published security advisories and corrections to 106 source packages, including six Linux kernel advisories (DSA-6381, DSA-6393, DSA-6405, DSA-6415, DSA-6466, DSA-6477). glibc fixes a buffer overflow (CVE-2026-5928) and buffer underflow (CVE-2026-5450), with 17 packages rebuilt against the updated library; qemu carries 25 CVEs including a secure boot bypass (CVE-2026-16288), imagemagick 24, wolfssl 15 and perl 13. Boot-chain fixes include a u-boot FIT image verification bypass (CVE-2026-46728), a BOOTP/DHCP buffer overread (CVE-2024-42040), and corrected intermediate certificate verification in sbsigntool. The installer was rebuilt with kernel ABI 6.12.107+deb13, and existing systems receive the fixes through normal package mirror updates.

Help Net Security·Sep 14, 07:40 UTC · 2d agoAdvisoryCVE-2026-5928CVE-2026-5450CVE-2026-34873+17 CVEs

GNU GRUB 2.14: serial-MMIO lockdown bypass in Canonical-signed gcdx64.efi

Canonical-signed GRUB2 serial command accepts arbitrary MMIO addresses, letting local attackers with grub.cfg control bypass Secure Boot lockdown.

A vulnerability in Canonical's grub-efi-amd64-signed (gcdx64.efi, GRUB 2.14) exposes a serial command that accepts a caller-supplied 64-bit MMIO base address. The lockdown path does not restrict this command even when lockdown=y under UEFI Secure Boot, and the serial implementation does not validate that the requested register span belongs to a real UART rather than ordinary RAM. A local attacker with control of GRUB's boot configuration can abuse this to bypass the Secure Boot lockdown.

oss-security·Sep 13, 13:59 UTC · 3d agoVulnerability2

Windows 11’s strongest security defenses can be bypassed without a screwdriver

Researchers found a script-only attack, 'Download More RAM', that rewrites DIMM configuration chips to bypass Windows 11 VBS and HVCI security boundaries.

Researchers at the University of Birmingham and Durham University showed that overwriting configuration data on unprotected DDR4/DDR5 module chips creates memory aliases that let attackers with existing privileged access defeat Virtualisation-based Security and HVCI, re-enable blocklisted drivers, kill EDR, and bypass group policy. Microsoft assigned CVE-2026-23670 and shipped mitigations in its April 2026 updates; systems with Secure Boot enabled are protected. Affected unprotected product lines are estimated at more than half of the high-performance consumer memory market and over 70% of the gaming segment.

Help Net Security·Aug 17, 00:00 UTC · Aug 17, 2026VulnerabilityCVE-2026-236701

MacOS 27 - First Boot, (Tue, Sep 15th)

SANS ISC documents the expected network traffic macOS 27 'Golden Gate' generates on first boot to help defenders baseline their networks.

Johannes Ullrich of SANS Internet Storm Center captured roughly 300 packets from a macOS 27 'Golden Gate' system before user login, covering DHCP, IPv6 duplicate address discovery, DNS, and TCP behavior. macOS 27 resolves hostnames like albert.apple.com (device activation, certificate-pinned), push messaging hosts, and ipv4only.arpa for NAT64 networks. The OS still uses a TCP window scale of 6, ECN, and random timestamps, with only four TCP connections observed during boot. The analysis provides a reference baseline for security teams monitoring Apple endpoints.

SANS Internet Storm Center·Sep 15, 15:23 UTC · 1d agoResearch

Microsoft’s September 2026 Patch Tuesday addresses 964 CVEs (CVE-2026-81963, CVE-2026-85880)

Microsoft's September 2026 Patch Tuesday fixes a record 964 CVEs, including two zero-days actively exploited in the wild.

Microsoft patched a record 964 CVEs in its September 2026 Patch Tuesday release, with 101 rated critical and 824 rated important, making it the largest Patch Tuesday to date. The release includes fixes for two zero-days that were exploited in the wild, with CVE-2026-81963 and CVE-2026-85880 highlighted in the release. Affected products span Windows core components, Office, Exchange, .NET, Visual Studio, Active Directory services (including AD CS and AD FS) and numerous Azure services. Tenable notes the release surpasses July's as the biggest ever.

Tenable Blog·Sep 8, 18:07 UTC · 8d agoVulnerability in the wildCVE-2026-81963CVE-2026-858801

Trusting-Trust Attack against an Entire Linux Distribution (via the strip utility)

ArXiv paper shows the trusting-trust compiler backdoor technique can compromise an entire Linux distribution via the strip utility.

The paper (arXiv 2607.24888) demonstrates that Ken Thompson's trusting-trust attack, long viewed as a compiler-specific threat, can backdoor an entire Linux distribution by targeting the strip utility. A compromised tool reproduces its backdoor in subsequent rebuilds of itself, generalizing the attack surface beyond compilers. The finding has supply-chain implications for build reproducibility and distribution trust, though it is a research result with no observed real-world exploitation.

Lobsters · security·Sep 5, 10:58 UTC · 11d agoResearch

Microsoft: Windows Server 2025 changes causing app crashes

Microsoft warns Windows Server 2025 memory-management changes crash AWE apps, including SQL Server with Lock Pages in Memory; disable LPIM as workaround.

Microsoft confirmed a known issue where Windows Server 2025 memory-management changes cause access violations, memory corruption, or unexpected termination in applications using Address Windowing Extensions (AWE). SQL Server running with the Lock Pages in Memory (LPIM) policy is affected, with symptoms including 0xC0000005 access violations, DBCC CHECKDB failures, crash dumps, and services stopping or restarting unexpectedly. Microsoft's temporary workaround is to disable the LPIM policy for the SQL Server service account or disable AWE in other affected apps, with a permanent fix promised in a future Windows update.

BleepingComputer·Sep 8, 11:57 UTC · 8d agoAdvisory1

Fake Apple Support AI Calls Target Stolen-Device Owners for Passcodes and 2FA Codes

SOCRadar details AnonyMousKIT, a phishing-as-a-service platform using AI voice agents posing as Apple Support to steal passcodes and 2FA codes.

SOCRadar's Threat Research Unit documented AnonyMousKIT, a credit-metered phishing-as-a-service platform that strips Activation Lock from stolen Apple devices across email, SMS, WhatsApp, recorded calls and AI voice agents. The 'Alice from Apple Support' personas request the device passcode, Apple ID credentials and a live 2FA code, with lures citing the handset's model identifier and live Find My status. Of 200 recovered AI calls made between August 31, 2025 and May 30, 2026, 179 targeted Brazil, and the calls cost $19.24 total via voice platform Vapi. Exposed log paths revealed 30 kit installations on 42 domains and 6,092 send attempts family-wide between March and July 2026.

The Hacker News·Aug 26, 05:49 UTC · 21d agoPhishing & fraud

USN-8514-2: OpenSSH vulnerability

Ubuntu backports an OpenSSH fix to older LTS releases for an scp flaw enabling setuid file placement and privilege escalation.

USN-8514-2 extends the USN-8514-1 OpenSSH fix to Ubuntu 14.04 LTS, 18.04 LTS, and 20.04 LTS. The flaw stems from incorrect file permission handling when downloading files as root using the legacy scp protocol without the preserve-mode option. An attacker could exploit this to install setuid or setgid files on the system, potentially leading to privilege escalation.

Ubuntu Security Notices·08:46 UTC · 11h agoVulnerability

Risky Bulletin: The EU publishes its upcoming cybersecurity standards

ETSI releases 17 draft cybersecurity standards vendors must meet when the EU Cyber Resilience Act takes effect in December 2027.

The European Telecommunications Standards Institute published 17 interim draft standards covering operating systems, routers, firewalls, VPNs, SIEMs, browsers, password managers, smart home devices, toys and wearables. They mandate basic security features such as post-sale updates, shipped SBOMs, modern cryptography and secure-by-default settings; public comments run until November, with final versions expected in December, one year before CRA compliance begins in December 2027. The newsletter also reports Irregular taking responsibility for AI test-environment escapes involving Anthropic and Meta frontier models, a breach at France's tax agency exposing 678,000+ citizens' data claimed by hacker ZeroBytes, and Kazakhstan eGov data covering 15 million citizens listed for sale on an underground forum. Additional briefs cover a $3.2 million Harmony Protocol theft crashing the ONE token 40%, Columbus Police still restoring systems two years after ransomware, DDoS attacks on Threema's provider, and Ukraine's GUR claiming a cyberattack on Wildberries.

Risky Business News·Aug 17, 05:03 UTC · Aug 17, 2026Policy & legal2

Cisco FMC bugs exploited by nation-state and ransomware actors (CVE-2026-20079, CVE-2026-20316)

Cisco Talos confirms nation-state (Sandworm) and ransomware (Qilin) actors actively exploit CVE-2026-20079 and CVE-2026-20316 in Secure Firewall Management Center.

CVE-2026-20079 is a critical unauthenticated authentication bypass in the FMC web interface allowing root-level script and command execution via crafted HTTP requests; CVE-2026-20316 stems from static hard-coded credentials enabling unauthenticated logins. Cisco Talos detailed three intrusion clusters: web shell and JAR deployment for credential theft, a Sandworm-attributed reverse shell and credential-harvesting implant, and a suspected Qilin ransomware operator chain. Cisco urges immediate hotfixes ahead of a comprehensive hardening release the week of September 16, or taking the FMC management interface offline.

Help Net Security·updated Sep 14, 09:27 UTC · 2d ago·first Sep 10, 11:22 UTC · 6d agoExploit / PoC in the wild 10 sourcesCVE-2026-20079CVE-2026-20316

Stealth rootkit targeting F5 BIG-IP could expose enterprise identity gateways

Sophos analyzed a stealth Linux rootkit that hides a web shell in memory on compromised F5 BIG-IP APM identity gateways, evading file-based detection.

Sophos analyzed a second-stage Linux rootkit implant found in compromised F5 BIG-IP APM environments running Apache and PHP, linked to exploitation of CVE-2025-53521, an unauthenticated RCE. The implant hooks Apache's PHP-loading process and serves modified in-memory versions of three legitimate webtop PHP files (apm_css.php3, full_wt.php3, webtop_popup_css.php3), leaving on-disk files untouched so hashes and integrity checks pass. It also establishes access via an authenticated local UNIX socket that can provide an interactive /bin/bash session. Experts warn compromised APM appliances, which handle federated SSO and terminate TLS at enterprise perimeters, could enable SSO token theft and lateral movement to trusted downstream applications.

CSO Online·Sep 10, 11:51 UTC · 6d agoMalware in the wildCVE-2025-53521

New DDRop Attack Breaks Intel TDX and AMD SEV-SNP Confidential Computing

DDRop uses a sub-$200 DDR5 interposer to drop memory writes, breaking Intel TDX and AMD SEV-SNP confidentiality guarantees.

Researchers at KU Leuven, ETH Zurich, Durham University, and Google will present DDRop at ACM CCS 2026, a first active interposer attack on DDR5 that silently drops memory writes so processors keep reading stale encrypted data, exploiting the missing freshness guarantee in Intel TDX, Intel Scalable SGX, and AMD SEV-SNP. On Intel TDX's default logical integrity mode it enabled reading victim VM memory, toggling debug mode, and forging remote attestation; AMD SEV-SNP was limited to copying pages between VMs. TDX's stronger cryptographic integrity blocks cross-VM attacks but likely not attestation forgery. The team will release board designs, firmware, and attack code on GitHub; no evidence of real-world use exists and no simple patch is available.

The Hacker News·updated Sep 15, 09:57 UTC · 1d ago·first Sep 14, 16:58 UTC · 2d agoResearch 2 sources

Omarchy: Any User Process Can Escalate to Root

A security write-up details how any user process on the Omarchy Linux setup can escalate privileges to root.

A post on 0xcc.io describes a local privilege escalation issue in Omarchy, the Arch-based Linux configuration, where any user process can escalate to root. The disclosure appears to describe a design-level weakness in the distribution's security model. No CVE identifier is mentioned in the available text.

Lobsters · security·Aug 30, 18:11 UTC · 17d agoVulnerability

Privileged File System Vulnerability Present in a SCADA System

Unit 42 details CVE-2025-0921 (CVSS 6.5), a privileged file operations flaw in Iconics Suite enabling DoS and privilege escalation.

Unit 42 disclosed CVE-2025-0921 (CVSS 6.5), an execution-with-unnecessary-privileges flaw in the Pager Agent of the AlarmWorX64 MMX feature of Mitsubishi Electric Iconics Digital Solutions GENESIS64. Attackers could misuse privileged file system operations to corrupt critical binaries, causing denial-of-service or integrity loss on vulnerable SCADA systems. The analysis demonstrates a chain with CVE-2024-7587, which grants excessive permissions to the C:\ProgramData\ICONICS directory via the GenBroker32 installer. Iconics released an advisory with a workaround that addresses the reported issues.

Palo Alto Unit 42·Aug 19, 12:04 UTC · 28d agoVulnerabilityCVE-2025-0921CVE-2024-7587

cPanel LiteSpeed Web Server Vulnerability Allows Shared Server Users to Gain Root-Level Access

Critical LiteSpeed Enterprise flaw fixed in 6.3.7 lets low-privilege shared-hosting users escalate to root and bypass CageFS.

cPanel issued an urgent advisory for a critical privilege escalation in LiteSpeed Web Server Enterprise versions before 6.3.7, allowing a low-privilege shared-hosting account to gain root-level server control and bypass tenant isolation controls including CloudLinux CageFS. Root access would let attackers access other hosted sites, steal databases and credentials, deploy phishing pages, and install backdoors. Administrators are urged to upgrade to 6.3.7 immediately via lsup.sh and to review privileged account activity, cron jobs, SSH keys, and system binaries; no CVE identifier was published.

Cyber Security News·Sep 15, 13:52 UTC · 1d agoVulnerability

Rootless Docker and Its Hidden Security Trade-Offs

A blog post examines the security trade-offs of running Docker in rootless mode, covering isolation benefits and hidden limitations for defenders.

Ken Muse published a write-up titled 'Rootless Docker and Its Hidden Security Trade-Offs', analyzing the security implications of rootless Docker deployments. The feed provides only the title, so detailed findings are not available in this item, but the piece targets the intersection of containerization and privilege isolation practices.

Lobsters · security·Aug 31, 03:12 UTC · 16d agoResearch1

Jellyfin 12.0 Released With Security Fixes for Unauthorized File Access and XSS Flaws

Jellyfin 12.0 fixes unauthorized file access and web client XSS flaws, but requires careful upgrades due to breaking database migrations and plugin changes.

The open-source media server release prevents crafted requests from reading files outside designated directories, blocks unauthorized re-runs of the setup wizard, rejects plugin packages with unsafe names, strengthens parental control enforcement, and fixes cross-site scripting vulnerabilities in browser-based administration and media access workflows. Upgrades require a manual backup because the database schema migration is irreversible; supported paths start from version 10.10.7 or 10.11.x, and duplicate case-insensitive usernames will break migration. The release also retires legacy /emby/ and /mediabrowser/ routes, disables deprecated authentication by default, and targets .NET 10, requiring plugin rebuilds.

GBHackers·Sep 8, 12:23 UTC · 8d agoVulnerability1

Akira Hits Safe Mode: Ransomware Rebooting Around EDR

Huntress documents an Akira ransomware affiliate rebooting endpoints into Windows Safe Mode to evade EDR and Defender, though Safe Mode broke the ransomware.

Huntress observed an Akira ransomware affiliate rebooting victim machines into Windows Safe Mode to disable EDR and Microsoft Defender before deploying ransomware. In an ironic twist, Safe Mode also prevented the ransomware from executing properly. The post walks through the full attack chain and the defensive lessons.

Huntress·Aug 12, 13:00 UTC · Aug 12, 2026Ransomware in the wild

The Roboguard Revolution is Short

404 Media·Aug 10, 13:04 UTC · Aug 10, 2026Industry

WordPress Security Plugins: How to Choose the Right One

Sucuri's guide breaks WordPress security plugins into hardening, malware scanning, integrity monitoring, and filtering types, and explains how to evaluate and layer them.

The Sucuri guide explains that WordPress security plugins bundle five capabilities - hardening, malware detection, integrity monitoring, activity logging, and application-level filtering - and that plugins run only after WordPress loads, unlike server-level firewalls. It lists leading causes of compromise: outdated plugins and themes, weak or reused credentials, nulled premium software, insecure configuration, and shared-hosting cross-contamination. It concludes with evaluation criteria and a post-installation security checklist for owners without dedicated security teams.

Sucuri Blog·Sep 5, 03:01 UTC · 11d agoIndustry

SafePal latest crypto hardware wallet maker affected by breach, with nearly 40,000 impacted

SafePal confirmed nearly 40,000 customers' order data was stolen, the third hardware wallet maker breached in a month after Trezor and Coinkite.

SafePal confirmed a breach exposing names, emails, shipping addresses, phone numbers, and purchase details of customers who ordered between March 2, 2025 and April 11, 2026, caused by a flaw in an order-tracking plugin. The company stressed wallets, seed phrases, and private keys remain secure, and all impacted customers were notified by email. A hacker advertised the stolen data on a dark web forum, and SafePal warned of targeted phishing via fake support calls and refund offers. CertiK data cited in the report shows 52 wrench attacks worldwide in H1 2026 with $124 million in losses, up 33% year-over-year.

The Record·Aug 17, 16:59 UTC · Aug 17, 2026Data breach in the wild

German Manufacturer Shrinks Security Alert Response While Protecting 10,000 Endpoints

Vendor case study: a German manufacturer's five-person SOC cut alert triage time using ANY.RUN's cloud sandbox across 10,000 endpoints.

ANY.RUN published a case study in which a five-person security team at an unnamed German manufacturer replaced an air-gapped forensic laptop with its cloud-managed interactive sandbox, protecting roughly 10,000 endpoints and 10,000 users. The vendor claims a median 15 minutes saved per alert, 20-40 daily tasks processed, a 2.5-minute alert-to-isolation target, and a 95% agreement rate between analyst and sandbox verdicts; all figures are vendor-supplied with the customer identity withheld. The writeup also describes detonating a multi-stage phishing chain from a PDF link to a password-protected ZIP to malware execution.

Cyber Security News·15:12 UTC · 5h agoIndustry 2 sources

Any user process can escalate to root

A disclosed local privilege escalation flaw allows any user process to escalate to root on the affected system.

A Lobsters-linked security write-up describes a vulnerability in which any user process can escalate its privileges to root. The feed text provides no product name, CVE identifier, CVSS score, or exploitation details, limiting available detail. Local privilege escalation flaws are commonly chained with other issues for full system compromise, so defenders should review the full write-up for affected versions and patches.

Lobsters · security·Aug 31, 13:46 UTC · 16d agoVulnerability

Attack Paths Into VMs in the Cloud

Unit 42 maps attack paths into AWS, Azure, and GCP VMs through intended features like startup scripts and SSH key pushes.

Palo Alto Unit 42 reviewed attack vectors against virtual machine services on AWS, Azure, and GCP, finding that 11% of internet-exposed cloud hosts carry Critical or High severity vulnerabilities. The attack paths rely on legitimate features such as EC2 User Data, VM custom data, EC2 Instance Connect, SSM Run Command, and serial consoles rather than vulnerabilities, and exploiting them requires attackers to first obtain control plane permissions. A compromised VM exposes not only its data but the workload identity and cloud permissions assigned to it, making identity compromise potentially more damaging than data theft. The firm places mitigation responsibility on cloud users and administrators.

Palo Alto Unit 42·Aug 17, 12:36 UTC · Aug 17, 2026Research1

Researchers Discover Hidden Backdoor in 20 Router Models Allowing Remote Root Access

Security Affairs·Aug 7, 10:17 UTC · Aug 7, 2026Malware

Has anybody seen my keys? A key-hierarchy strategy for rack-level security

Oxide's RFD 0301 proposes a rack-level key hierarchy using Shamir secret sharing and a trust quorum to protect data-at-rest keys.

Oxide's request for discussion (RFD 0301) lays out a key-hierarchy strategy for rack-level security, deriving keys from a rack secret protected by Shamir secret sharing across a trust quorum of sleds, with keys exchanged over authenticated sprockets sessions. The document maps which keys protect control-plane data, metrics, Crucible extents, and authentication tokens, and defines open questions on key lifecycle, locality, and compromise handling. Future work includes sealing shares with the root of trust so an attacker would need to steal K whole sleds to reconstruct the rack secret.

Hacker News · security·Sep 7, 02:14 UTC · 9d agoResearchHN 52↑ · 3 comments

Iranian cyber targeting of dissidents, activists and journalists

UK NCSC, FBI, and Dutch AIVD expose CHOSEN BRICK spyware used by Iranian state actors against dissidents, activists, and journalists worldwide.

A joint advisory from the UK NCSC, FBI, and Dutch AIVD details CHOSEN BRICK, a Windows spyware family used by Iranian state cyber actors since at least 2025 against dissidents, activists, and journalists in the UK, US, and Netherlands. Actors build rapport on WhatsApp and Telegram impersonating known contacts or platform support, then deliver disguised payloads resembling apps such as Telegram, Norton, RunwayML, or fake MRI results. The malware persists via HKCU Run registry keys, adds Microsoft Defender exclusions, and uses a unique Telegram bot C2 per victim. Capabilities include screen capture, microphone recording, process enumeration, email and messaging data theft, file deletion, and system wiping; victim data has appeared on pro-Iranian leak sites.

NCSC UK·Sep 15, 12:00 UTC · 1d agoThreat actor in the wild2

Week in review: Cisco fixes IMC bug, Patch Tuesday forecast, Black Hat USA 2026

Help Net Security·Aug 9, 00:00 UTC · Aug 9, 2026VulnerabilityCVE-2026-66066CVE-2026-185771

Shared Hosting at Risk: LiteSpeed Enterprise Bug Can Grant Root from a Single Tenant

Critical LiteSpeed Web Server Enterprise flaw (pre-6.3.7) lets a low-privilege shared-hosting tenant escape CageFS isolation and gain root; forced update urged.

cPanel warned that a critical privilege-escalation vulnerability in LiteSpeed Web Server Enterprise (fixed in 6.3.7) lets a malicious low-privilege website user bypass account isolation controls including CloudLinux CageFS and gain root on shared-hosting servers, enabling cross-tenant compromise. No CVE, severity rating, or technical details have been published, and it is unclear whether the flaw is being exploited. This is the third root-level LiteSpeed escape on cPanel servers since May, following CVE-2026-48172 and CVE-2026-54420, which were actively exploited and added to CISA's KEV catalog.

Security Affairs·Sep 15, 12:19 UTC · 1d agoVulnerability 2 sourcesCVE-2026-48172CVE-2026-54420

New KATARU IoT Malware Packs Linux Privilege Escalation Exploits and Mirai-Style DDoS Attacks

Nozomi Networks identified KATARU, a new Mirai-style IoT botnet delivered via Telnet brute force that uses Linux privilege-escalation exploits and encrypted C2 for DDoS floods.

Nozomi Networks identified KATARU in August after a Telnet password-guessing attack against a honeypot retrieved an ARM payload. The malware attempts exploits for CVE-2026-46300 (Fragnesia), CVE-2026-43284 (DirtyFrag), and CVE-2026-31431 (Copy Fail), plus a cgroup v1 release_agent escape, and persists via systemd services, cron tasks, rc scripts, OpenWrt hooks, and Android boot locations. Its C2 uses X25519 key exchange with ChaCha20-Poly1305 encryption and supports TCP, UDP, ICMP, HTTP, QUIC, and DNS floods, plus SSH brute forcing and command execution; embedded exploit shellcode in the ARM build targeted x86, suggesting untested copied code.

Cyber Security News·Sep 11, 14:17 UTC · 5d agoMalware in the wild 2 sourcesCVE-2026-46300CVE-2026-43284CVE-2026-31431

USN-8773-1: GNU Guix vulnerability

Ubuntu issued USN-8773-1 fixing a GNU Guix flaw that exposed build outputs to local users before metadata finalization, enabling possible privilege escalation.

Ubuntu published security notice USN-8773-1 to address a flaw in GNU Guix where build outputs were made accessible to local users before their file metadata was finalized. A local attacker could possibly leverage this window to gain elevated privileges on the affected system. The notice ships updated packages for supported Ubuntu releases and reports no exploitation.

Ubuntu Security Notices·updated 14:37 UTC · 5h ago·first 11:33 UTC · 8h agoAdvisory 13 sources

Siemens Reyrolle 7SR5

CISA advisory covers 14 vulnerabilities, CVSS 9.8, in Siemens Reyrolle 7SR5 energy-sector protection relays before V2.70.

CISA advisory ICSA-26-258-05 covers 14 vulnerabilities in Siemens Reyrolle 7SR5 protection relays before V2.70, used in the energy sector worldwide, with aggregate CVSS v3 of 9.8. Flaws include Cesanta Mongoose web server issues (CVE-2024-42384 through CVE-2024-42392) and new bugs such as web-interface session-ID exposure enabling authentication bypass (CVE-2026-62645, CVSS 9.8), predictable session tokens (CVE-2026-62646, CVE-2026-62647), and pre-auth out-of-bounds writes (CVE-2026-62648). Siemens has released V2.70 and recommends updating to the latest version.

CISA Advisories·Sep 15, 12:00 UTC · 1d agoAdvisoryCVE-2024-42384CVE-2024-42385CVE-2024-42386+11 CVEs