CVE - CVE-2023-28436

CVE-ID
CVE-2023-28436	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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 POSIX meant that the Tailscale client running on a FreeBSD-based operating system did not appropriately restrict groups on the host when using Tailscale SSH. When accessing a FreeBSD host over Tailscale SSH, the egid of the tailscaled process was used instead of that of the user specified in Tailscale SSH access rules. Tailscale SSH commands may have been run with a higher privilege group ID than that specified in Tailscale SSH access rules if they met all of the following criteria: the destination node was a FreeBSD device with Tailscale SSH enabled; Tailscale SSH access rules permitted access for non-root users; and a non-interactive SSH session was used. Affected users should upgrade to version 1.38.2 to remediate the issue.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://github.com/tailscale/tailscale/commit/d00c046b723dff6e3775d7d35f891403ac21a47d URL:https://github.com/tailscale/tailscale/commit/d00c046b723dff6e3775d7d35f891403ac21a47d MISC:https://github.com/tailscale/tailscale/releases/tag/v1.38.2 URL:https://github.com/tailscale/tailscale/releases/tag/v1.38.2 MISC:https://github.com/tailscale/tailscale/security/advisories/GHSA-vfgq-g5x8-g595 URL:https://github.com/tailscale/tailscale/security/advisories/GHSA-vfgq-g5x8-g595 MISC:https://tailscale.com/security-bulletins/#ts-2023-003 URL:https://tailscale.com/security-bulletins/#ts-2023-003
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20230315	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20230315)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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