SonicWall SonicOS Buffer Overflow Vulnerability (CVE-2020-5135)
Severity: critical · Patch status: patched · Since 2022-03-15 · CVE-2020-5135
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. CISA added CVE-2020-5135 to its Known Exploited Vulnerabilities catalog on Mar 15, 2022, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Apr 5, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
