CVE intelligence and bounded remediation

CVE-2020-5141 — A vulnerability in SonicOS allows a remote unauthenticated attacker to brute force Virtual Assist ticket ID in the firewall SSLVPN service

Medium CVSS 6.5

A vulnerability in SonicOS allows a remote unauthenticated attacker to brute force Virtual Assist ticket ID in the firewall SSLVPN service. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version SonicOS 7.0.0.0.

Severity
Medium
CVSS
6.5 (3.1)
Published
2020-10-12
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-799, CWE-307

Affected products

  • sonicwall / sonicos
  • sonicwall / sonicos / 7.0.0.0
  • sonicwall / sonicosv

Showing 3 representative product identities from 6 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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