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TI-2023-26491 Aliases CVE-2023-48643GHSA-hp95-552p-6qxj

Shrubbery tac_plus 2.x, 3.x.

Priority HIGH 82CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01168 67th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE names CISA-ADP · 3

CPEVersionsRoleVendor
cpe:2.3:a:shrubbery:tac_plus_2x:*:*:*:*:*:*:*:*——Shrubbery
cpe:2.3:a:shrubbery:tac_plus_3x:*:*:*:*:*:*:*:*——Shrubbery
cpe:2.3:a:shrubbery:tac_plus_4x:*:*:*:*:*:*:*:*——Shrubbery
  • cpe:2.3:a:shrubbery:tac_plus_2x:*:*:*:*:*:*:*:* Versions — — ·Shrubbery
  • cpe:2.3:a:shrubbery:tac_plus_3x:*:*:*:*:*:*:*:* Versions — — ·Shrubbery
  • cpe:2.3:a:shrubbery:tac_plus_4x:*:*:*:*:*:*:*:* Versions — — ·Shrubbery

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-48643
  2. 2026-10-03 Alias added: GHSA-hp95-552p-6qxj

References

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences