Input validation error in Tacacs - CVE-2023-45239
Published: October 6, 2023
Vulnerability identifier: #VU81673
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-45239
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to insufficient validation of username, NAS_name, and NAC_address fields in programs.c. A remote attacker can send specially crafted input to the daemon and potentially bypass authentication.
Affected software
Tacacs
Gentoo Linux
Fedora
tacacs
Gentoo Linux
Fedora
tacacs
How to mitigate CVE-2023-45239
The vulnerability is fixed in the git repository of Tacacs+ Facebook fork.
tacacs - addressed in versions F4.0.4.28.7fb~20231005g4fdf178-1.fc37, F4.0.4.28.7fb~20231005g4fdf178-1.fc38, F4.0.4.28.7fb~20231005g4fdf178-1.fc39, F4.0.4.28.7fb~20231005g4fdf178-1.fc40, F4.0.4.28.7fb~20231005g4fdf178-2.el8, F4.0.4.28.7fb~20231005g4fdf178-2.el9