CVE-2023-45239 json
A lack of input validation exists in tac_plus prior to commit 4fdf178 which, when pre or post auth commands are enabled, allows an attacker…
published 2023-10-06 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-49545
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
A lack of input validation exists in tac_plus prior to commit 4fdf178 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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
2.26% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/facebook/tac_plus/pull/41 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Meta tac_plus
Classification
- Weakness
-
- CWE-790 Improper Filtering of Special Elements
References
-
github.com
/facebook/tac_plus/pull/41
exploit, patch
-
github.com
/facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH/
mailing-list, third-party-advisory
Sources
- CVE List CVE-2023-45239
- NVD CVE-2023-45239
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.