CVE-2021-27877 is a vulnerability in Veritas Backup Exec
Published on March 1, 2021
An issue was discovered in Veritas Backup Exec before 21.2. It supports multiple authentication schemes: SHA authentication is one of these. This authentication scheme is no longer used in current versions of the product, but hadn't yet been disabled. An attacker could remotely exploit this scheme to gain unauthorized access to an Agent and execute privileged commands.
Known Exploited Vulnerability
This Veritas Backup Exec Agent Improper Authentication Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Veritas Backup Exec (BE) Agent contains an improper authentication vulnerability that could allow an attacker unauthorized access to the BE Agent via SHA authentication scheme.
The following remediation steps are recommended / required by April 28, 2023: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2021-27877 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.
Products Associated with CVE-2021-27877
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.