Risk Letters

Exploited vulnerability

CVE-2020-5135

TLP:CLEAR

SonicWall SonicOS Buffer Overflow Vulnerability

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.

Facts

  • Vendor: SonicWall
  • Product: SonicOS
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 26.9 %
  • On CISA's Known Exploited Vulnerabilities list since: 15 March 2022
  • First known exploitation: 15 March 2022
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 5 April 2022
  • Weakness: CWE-120
  • First seen by Risk Letters: 15 March 2022

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD