Tac Plus · Tac Plus · CVE-2023-45239
**Name of the Vulnerable Software and Affected Versions**
tac plus versions prior to commit 4fdf178
**Description**
A lack of input validation exists in tac plus, which, when pre or post auth commands are enabled, allows an attacker who can control the `username`, `rem-addr`, or `NAC address` sent to tac plus to inject shell commands and gain remote code execution on the tac plus server.
**Recommendations**
For versions prior to commit 4fdf178, consider disabling pre or post auth commands until a patch is available.
Restrict access to the tac plus server to minimize the risk of exploitation.
Avoid using the `username`, `rem-addr`, or `NAC address` parameters in the affected tac plus configuration until the issue is resolved.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.