CVE-2020-5135: SonicWall SonicOS Buffer Overflow Vulnerability

CVE-2020-5135 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-03-15

A stack-based buffer overflow vulnerability in SonicWall SonicOS allows a remote unauthenticated attacker to cause a Denial of Service (DoS) or potentially execute arbitrary code. The flaw is triggered by sending a specially crafted malicious request to the firewall's management interface.

Technologies: SonicWall SonicOS. Vendors: SonicWall.

Quick answers

Is CVE-2020-5135 exploited in the wild?
Yes. CVE-2020-5135 is known to be exploited in the wild, first recorded on 15 March 2022. Treat it as urgent.
How severe is CVE-2020-5135?
Critical severity, with a CVSS score of 9.8, published 15 March 2022.
Which products and versions are affected?
SonicWall SonicOS 6.0.5.3, 6.5.1.12, 6.5.4.7, 7.0.0.0; SonicWall SonicOSv 6.5.4.v.
Is there a fix for CVE-2020-5135?
A patch was published on 2022-04-05: CISA due date for applying vendor updates Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-5135 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2020-5135?
Check whether you run SonicWall SonicOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • SonicWall SonicOS 6.0.5.3, 6.5.1.12, 6.5.4.7, 7.0.0.0
  • SonicWall SonicOSv 6.5.4.v

Timeline

  • 2020-10-12: disclosed: NVD Published Date
  • 2022-03-15: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-04-05: patched: CISA due date for applying vendor updates

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