Vulnerability in Facebook Tac Plus
CVE-2023-45239
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.022 (82.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.022 · change: +0.004
Affected products
- Facebook Tac Plus
- Meta Tac Plus — versions 0
- Fedoraproject Fedora — versions 39
Weakness classification (CWE)
Public proof-of-concept exploits
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/… (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-45239?
- CVE-2023-45239 is a critical-severity vulnerability in Facebook Tac Plus, classified under CWE-790. CVSS score: 9.8/10. Published 2023-10-06.
- How severe is CVE-2023-45239?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-45239 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.