Improper Authentication in Backup Exec - CVE-2021-27877
Published: April 5, 2023
Vulnerability identifier: #VU74471
CSH Severity: Critical
CVSS v4 BT: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Red]
CVE-ID: CVE-2021-27877
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to an usage of obsolete however not disabled SHA authentication scheme. A remote non-authenticated attacker can use the SHA authentication scheme to gain unauthorized access to the BE Agent and execute privileged commands on the system.
Affected software
Backup Exec
How to mitigate CVE-2021-27877
Install updates from vendor's website.
Backup Exec - update to 21.2