HOMEVULNERABILITIESCVE-2023-45239
CRITICAL

CVE-2023-45239

NVD-CWE-noinfoPublished: October 6, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-45239 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

facebook1 product(s)
tac plus
Fedora1 product(s)
fedora
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/facebook/tac_plus/pull/41
PATCHhttps://github.com/facebook/tac_plus/pull/41
ADVISORYhttps://github.com/facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3
ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH/
ADVISORYhttps://github.com/facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3
ADVISORYhttps://lists.fedoraproject.org/archives/list/[email protected]/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH/

All References (6)

→
https://github.com/facebook/tac_plus/pull/41Exploit · Patch
→
https://github.com/facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3Vendor Advisory
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH/Mailing List · Third Party Advisory
→
https://github.com/facebook/tac_plus/pull/41Exploit · Patch
→
https://github.com/facebook/tac_plus/security/advisories/GHSA-p334-5r3g-4vx3Vendor Advisory
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/X4J7ZYMFZB4G4OU5EDJPQLP6F6RKDGIH/Mailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2023-45239
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedOct 6, 2023

Related CVEs (NVD-CWE-noinfo)

CVE-2026-46798
10.0
CVE-2013-2422
10.0
CVE-2012-1484
10.0
CVE-2009-2452
10.0
CVE-2005-2222
10.0
CVE-2008-6566
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-45239 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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