CVE-2021-27878: Veritas Backup Exec Agent Command Execution Vulnerability
First published: Mon Mar 01 2021(Updated: )
An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typically completed over a secure TLS communication. However, due to a vulnerability in the SHA Authentication scheme, an attacker is able to gain unauthorized access and complete the authentication process. Subsequently, the client can execute data management protocol commands on the authenticated connection. The attacker could use one of these commands to execute an arbitrary command on the system using system privileges.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Symantec Veritas Backup Exec | <21.2 | |
| Veritas Backup Exec |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-27878?
CVE-2021-27878 has been assigned a medium severity rating due to its potential for remote code execution.
How do I fix CVE-2021-27878?
To remediate CVE-2021-27878, upgrade Veritas Backup Exec to version 21.2 or later.
What kind of attacks can exploit CVE-2021-27878?
CVE-2021-27878 can be exploited by attackers who can intercept communications due to vulnerabilities in the SHA Authentication scheme.
Which versions of Veritas Backup Exec are affected by CVE-2021-27878?
CVE-2021-27878 affects all versions of Veritas Backup Exec prior to version 21.2.
Are there any workarounds for CVE-2021-27878 before upgrading?
There are no published workarounds for CVE-2021-27878; upgrading is strongly recommended.
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