SonicWall SonicOS Buffer Overflow Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-15
• Known to be used in ransomware campaigns
• EPSS: 27% chance of exploitation in the next 30 days (higher than 98% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

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. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 5 Apr 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010Vendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource