Search: “decryption”

2 stories in the last 3d

Ubuntu patches python-cryptography flaws including a PKCS#7 timing side-channel (CVE-2026-69247) that could allow key recovery.

Ubuntu Security Notice USN-8776-1 fixes multiple vulnerabilities in python-cryptography. CVE-2026-69247 describes distinguishable PKCS#7 decryption outcomes with observable timing differences that a remote attacker could exploit to recover encryption keys; it affects Ubuntu 26.04 LTS. CVE-2023-23931, affecting only Ubuntu 18.04 LTS, involves incorrect handling of objects with immutable buffers during cipher operations, causing corrupted output, and a third issue reported by Jack Lloyd is also addressed.

Ubuntu Security NoticesSep 16, 20:12 UTC · 4h agoAdvisory 15 sources CVE-2023-23931 CVE-2026-69247

CISA Shares 17 Techniques Used by Hackers to Compromise Active Directory

CISA and five international agencies publish joint guidance detailing 17 techniques attackers use to compromise Microsoft Active Directory environments.

CISA, NSA, and the Australian Signals Directorate's ACSC, with contributions from Canadian, UK, and New Zealand cyber centers, released technical guidance on 17 Active Directory attack techniques. It covers AD Domain Services, AD Certificate Services, and AD Federation Services, including Kerberoasting, DCSync, Golden Ticket, Golden SAML, Skeleton Key, and Shadow Credentials. The guidance recommends treating domain controllers, CAs, AD FS servers, and Entra Connect systems as Tier 0 assets with phishing-resistant MFA, Kerberos pre-authentication enforcement, and disabling NTLM/SMBv1.

Cyber Security NewsSep 15, 16:05 UTC · 1d agoAdvisory

Search: “decryption”

USN-8776-1: python-cryptography vulnerabilities

CISA Shares 17 Techniques Used by Hackers to Compromise Active Directory