CVE-2023-48643
CriticalSummary
Podatność w Shrubbery tac_plus w wersjach 2.x, 3.x i 4.x do F4.0.4.28 umożliwia zdalne wykonanie poleceń bez uwierzytelnienia. Użytkownicy mogą konfigurować kontrole autoryzacji jako polecenia powłoki w pliku konfiguracyjnym tac_plus.cfg, co pozwala na wstrzykiwanie dodatkowych poleceń.
Risk Assessment
Brak pre-shared secret w instalacji zwiększa ryzyko, ponieważ atakujący może wykonać polecenia bez uwierzytelnienia, znając jedynie nazwę użytkownika skonfigurowanego do użycia polecenia pre-autoryzacji. To stwarza poważne zagrożenie dla bezpieczeństwa systemu.
Recommendation
Zaleca się skonfigurowanie pre-shared secret oraz przegląd i zabezpieczenie pliku konfiguracyjnego tac_plus.cfg, aby zminimalizować ryzyko wstrzykiwania poleceń.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

