SARA / Free Tools / CVE / CVE-2023-28436

CVE-2023-28436 — Tailscale is software for using Wireguard and multi-factor authentication (MFA)

Tailscale is software for using Wireguard and multi-factor authentication (MFA). A vulnerability identified in the implementation of Tailscale SSH starting in version 1.34.0 and prior to prior to 1.38.2 in FreeBSD allows commands to be run with a higher privilege group ID than th

CVSS
5.7 MEDIUM
EPSS
0.08% (top 77.30%)
CWE
CWE-269
Published
2023-03-23T19:27:48.051Z
Last modified
2025-02-25T14:50:44.790Z
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:N/A:N

01What is this vulnerability?

Tailscale is software for using Wireguard and multi-factor authentication (MFA). A vulnerability identified in the implementation of Tailscale SSH starting in version 1.34.0 and prior to prior to 1.38.2 in FreeBSD allows commands to be run with a higher privilege group ID than that specified in Tailscale SSH access rules. A difference in the behavior of the FreeBSD `setgroups` system call from…

02Affected products

VendorProductVersions
tailscaletailscale>= 1.34.0, < 1.38.2

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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