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CVE-2024-20353: Cisco ASA and FTD Denial of Service Vulnerability

criticalknown exploitedCVE-2024-20353
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an infinite loop vulnerability that can lead to remote denial of service condition.

CSIRTS triage

vendor: Ciscoproduct: Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)Denial of service
What
The vulnerability can lead to a remote denial of service condition due to an infinite loop.
Who is affected
Deployments of Cisco ASA and FTD are affected.
Urgency
Remediation is urgent as the vulnerability is actively exploited and has critical severity.
Action
Update to the latest version as per Cisco's advisories.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-04-24
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-20353

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-20353coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Cisco ASA and

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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