CVE-2021-27877: Veritas Backup Exec Agent Improper Authentication Vulnerability

CVE-2021-27877 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2023-04-07

Veritas Backup Exec Agent contains an improper authentication vulnerability due to the continued support of a legacy SHA authentication scheme. Remote attackers can exploit this scheme to bypass authentication and execute privileged commands on the affected Agent.

Technologies: Veritas Backup Exec Agent. Vendors: Veritas.

Quick answers

Is CVE-2021-27877 exploited in the wild?
Yes. CVE-2021-27877 is known to be exploited in the wild, first recorded on 7 April 2023. Treat it as urgent.
How severe is CVE-2021-27877?
Critical severity, with a CVSS score of 9.8, published 7 April 2023.
Which products and versions are affected?
Veritas Backup Exec Agent before 21.2.
Is there a fix for CVE-2021-27877?
A patch was published on 2021-03-01: Fixed in version 21.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-27877 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-27877?
Check whether you run Veritas Backup Exec Agent. 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

  • Veritas Backup Exec Agent before 21.2

Timeline

  • 2021-03-01: disclosed: NVD Published Date
  • 2023-04-07: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-03-01: patched: Fixed in version 21.2
  • 2023-04-07: exploited: Reported as exploited in the wild per CISA KEV catalog entry date

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