Five Eyes alliance warns of attacks exploiting known Ivanti Gateway flaws
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2024-21887 +1 in the same advisory: …46805 | Command Injection RCE in Ivanti Connect Secure and Policy Secure Ivanti Connect Secure (formerly Pulse Connect Secure) and Ivanti Policy Secure appliances contain a command injection flaw (CWE-77) in their web components, triggered when an authenticated administrator sends crafted requests to the appliance. The bug can be chained with the separate authentication bypass CVE-2023-46805, allowing an unauthenticated attacker to achieve the same result. Successful exploitation lets an attacker execute arbitrary commands and code on the appliance, providing a foothold into the networks behind the VPN or network access control gateway. Any organization running these appliances, typically enterprises and government agencies often deployed directly on the internet perimeter, is affected. Exploitation is confirmed in the wild: the flaw was added to CISA's Known Exploited Vulnerabilities catalog on 2024-01-10 with known ransomware use and EPSS assigns a 100% probability of exploitation within 30 days, although no public proof-of-concept is available. Do: Apply Ivanti's mitigations or patched builds immediately per vendor instructions, addressing the chained authentication bypass CVE-2023-46805 at the same time, and discontinue or restrict use of any appliance for which mitigations are unavailable, especially if it is internet-facing. Because exploitation with ransomware use is known, assume compromise is possible: review appliance web logs for suspicious requests and run Ivanti's integrity-checking guidance to verify appliance images before and after remediation. Where feasible, restrict direct internet exposure of the appliance web interface and monitor for further vendor advisories. | 9.1 group max | 100% | KEV ransomware PoC |
| largetens of thousands of appliances (roughly 20,000-30,000 internet-exposed ICS gateways at disclosure; total deployed base likely higher) | |
| CVE-2024-21888 | A privilege escalation vulnerability in web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows a user to elevate privile A privilege escalation vulnerability in web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows a user to elevate privileges to that of an administrator. NVD description · AI analysis pending | 8.8 | 87% |
| — | ||
| CVE-2024-21893 | SSRF in Ivanti Connect Secure, Policy Secure, and Neurons SAML Component CVE-2024-21893 is a server-side request forgery (SSRF) vulnerability in the SAML component of Ivanti Connect Secure (formerly Pulse Connect Secure), Ivanti Policy Secure, and Ivanti Neurons. A remote attacker can trigger the flaw with crafted unauthenticated requests to the SAML component, causing the appliance to make requests to otherwise restricted resources. Successful exploitation allows the attacker to access certain restricted resources without any credentials, and CISA notes the flaw has been used in ransomware operations. Any organization running an affected Ivanti Connect Secure, Policy Secure, or Neurons deployment is exposed, particularly where the appliance is reachable from the internet. The vulnerability is confirmed exploited in the wild: it was added to CISA's Known Exploited Vulnerabilities catalog on 2024-01-31, carries an EPSS probability of 100%, and no public proof-of-concept is known. Do: Apply Ivanti's released patches or the vendor-issued mitigations immediately per vendor instructions, or discontinue use of the product if mitigations are unavailable, as required by CISA. Because ransomware use is documented, review SAML-related logs and appliance audit trails for signs of exploitation and follow-on compromise, and check for indicators of post-exploitation activity. Monitor Ivanti advisories for patched version numbers and updated mitigation guidance, since specific fixed versions are not yet specified in the available data. | 8.2 | 100% | KEV ransomware |
| largetens of thousands of internet-exposed appliances (with total user counts likely in the hundreds of thousands) | |
| CVE-2024-22024 | An XML external entity or XXE vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x), Ivanti Policy Secure (9.x, 22.x) and ZTA gateways which An XML external entity or XXE vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x), Ivanti Policy Secure (9.x, 22.x) and ZTA gateways which allows an attacker to access certain restricted resources without authentication. NVD description · AI analysis pending | 8.3 | 95% |
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Full article706 words · extracted from securityaffairs.com · click to collapse
The Five Eyes alliance warns of threat actors exploiting known security flaws in Ivanti Connect Secure and Ivanti Policy Secure gateways.
The Five Eyes intelligence alliance issued a joint cybersecurity advisory warning of threat actors exploiting known vulnerabilities in Ivanti Connect Secure and Ivanti Policy Secure gateways.
The advisory provides details about the exploitation in the wild of Connect Secure and Policy Secure vulnerabilities CVE-2023-46805, CVE-2024-21887, and CVE-2024-21893. Multiple threat actors are chaining these issues to bypass authentication, craft malicious requests, and execute arbitrary commands with elevated privileges.
The CISA’s advisory also warns that the Ivanti Integrity Checker Tool is not sufficient to detect a compromise. Government experts also reported that the exploitation of the flaw can allow threat actors to maintain root-level persistence.
“The advisory describes cyber threat actor exploitation of multiple previously identified Connect Secure and Policy Secure vulnerabilities—namely CVE-2023-46805, CVE-2024-21887, and CVE-2024-21893—which threat actors can exploit in a chain to bypass authentication, craft malicious requests, and execute arbitrary commands with elevated privileges.” reads the advisory. “Additionally, the advisory describes two key CISA findings:
- The Ivanti Integrity Checker Tool is not sufficient to detect compromise due to the ability of threat actors to deceive it, and
- A cyber threat actor may be able to gain root-level persistence despite the victim having issued factory resets on the Ivanti device.”
The advisory includes mitigations and indicators of compromise (IOCs).
Below are the descriptions of the vulnerabilities included in the advisory:
- The flaw CVE-2023-46805 (CVSS score 8.2) is an Authentication Bypass issue that resides in the web component of Ivanti ICS 9.x, 22.x and Ivanti Policy Secure. A remote attacker can trigger the vulnerability to access restricted resources by bypassing control checks.
- The second vulnerability, tracked as CVE-2024-21887 (CVSS score 9.1) is a command injection issue in web components of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure. An authenticated administrator can exploit the issue by sending specially crafted requests and execute arbitrary commands on the appliance. An attacker can chain this flaw with the vulnerability CVE-2023-46805 to send specially crafted requests to unpatched systems and execute arbitrary commands.
- The vulnerability CVE-2024-21893 is a server-side request forgery vulnerability in the SAML component of Connect Secure (9.x, 22.x), Policy Secure (9.x, 22.x) and Neurons for ZTA. An authenticated attacker can exploit the issue to access certain restricted resources.
The software firm also addressed the following two additional high-severity vulnerabilities:
- CVE-2024-21888 (CVSS score: 8.8) – Privilege escalation vulnerability in web component
- CVE-2024-22024 (CVSS score: 8.3) – XXE vulnerability in the SAML component
“The authoring organizations encourage network defenders to (1) assume that user and service account credentials stored within the affected Ivanti VPN appliances are likely compromised, (2) hunt for malicious activity on their networks using the detection methods and indicators of compromise (IOCs) within this advisory, (3) run Ivanti’s most recent external ICT, and (4) apply available patching guidance provided by Ivanti as version updates become available.” continues the advisory. “If a potential compromise is detected, organizations should collect and analyze logs and artifacts for malicious activity and apply the incident response recommendations within this advisory.”
In response to the joint advisory and its findings, Ivanti published an update stating that technical findings observed in CISA’s lab have not been observed in real-world scenarios or considered viable in live customer environments. CISA and other government agencies suggest that defenders utilize Ivanti’s recently released external Integrity Checker Tool (ICT), made available on 27th February.
“As part of our exhaustive investigation into the recent attack against our customers, Ivanti and Mandiant released findings today regarding evolving threat actor tactics, techniques and procedures (TTPs). These findings were identified in the ongoing analysis of the previously disclosed vulnerabilities affecting Ivanti Connect Secure, Policy Secure and ZTA gateways, and include potential persistence techniques that we are monitoring, even though to date they have not been deployed successfully in the wild.” said the software firm.
“Importantly, this is not a new CVE, and we and our security and government partners are not aware of any instances of successful threat actor persistence following implementation of security updates and factory resets.“
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