CVE-2022-35254
Published: 05 December 2022
Summary
CVE-2022-35254 is a high-severity Use After Free (CWE-416) vulnerability in Ivanti Connect Secure. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 6.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2022-35254 is a denial-of-service vulnerability affecting Ivanti Connect Secure in versions prior to 9.1R14.3, 9.1R15.2, 9.1R16.2, and 22.2R4, Ivanti Policy Secure in versions prior to 9.1R17 and 22.3R1, and Ivanti Neurons for Zero-Trust Access in versions prior to 22.3R1. It carries a CVSS 3.1 base score of 7.5 and is associated with CWE-416 and CWE-400.
An unauthenticated network attacker can trigger the flaw without credentials or user interaction, resulting in a high impact on availability while leaving confidentiality and integrity unaffected.
The referenced Ivanti advisory SA45520 identifies the vulnerable releases and directs administrators to apply the listed fixed versions to eliminate exposure.
EPSS scores have remained near 0.1 with negligible movement between the recorded current and peak values.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-38145
Vulnerability details
An unauthenticated attacker can cause a denial-of-service to the following products: Ivanti Connect Secure (ICS) in versions prior to 9.1R14.3, 9.1R15.2, 9.1R16.2, and 22.2R4, Ivanti Policy Secure (IPS) in versions prior to 9.1R17 and 22.3R1, and Ivanti Neurons for Zero-Trust…
more
Access in versions prior to 22.3R1.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.