CVE

CVE-2023-48643

Date: (C)2024-05-17   (M)2024-06-07

Shrubbery tac_plus 2.x, 3.x. and 4.x through F4.0.4.28 allows unauthenticated Remote Command Execution. The product allows users to configure authorization checks as shell commands through the tac_plus.cfg configuration file. These are executed when a client sends an authorization request with a username that has pre-authorization directives configured. However, it is possible to inject additional commands into these checks because strings from TACACS+ packets are used as command-line arguments. If the installation lacks a a pre-shared secret (there is no pre-shared secret by default), then the injection can be triggered without authentication. (The attacker needs to know a username configured to use a pre-authorization command.) NOTE: this is related to CVE-2023-45239 but the issue is in the original Shrubbery product, not Meta's fork.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 9.8		CVSS Score :
Exploit Score:		Exploit Score:
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CVSS V3 Metrics:		CVSS V2 Metrics:
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Attack Complexity:		Access Complexity:
Privileges Required:		Authentication:
User Interaction:		Confidentiality:
Scope:		Integrity:
Confidentiality:		Availability:
Integrity:
Availability:

Reference:

https://github.com/takeshixx/tac_plus-pre-auth-rce