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CVE-2020-5135: SonicWall SonicOS Buffer Overflow Vulnerability

criticalknown exploitedCVE-2020-5135
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.
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.

CSIRTS triage

vendor: SonicWallproduct: SonicOSDenial of serviceRemote code execution
What
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.
Who is affected
All deployments of SonicWall SonicOS that are exposed to the internet.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of SonicOS.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-15
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-5135

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-2020-5135coverage & exploitation statusNVD · CVE.org

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