x/vulndb: potential Go vuln in tailscale.com: GHSA-vfgq-g5x8-g595

[GoVulnBot]

In GitHub Security Advisory GHSA-vfgq-g5x8-g595, there is a vulnerability in the following Go packages or modules:

Unit	Fixed	Vulnerable Ranges
tailscale.com	1.38.2	>= 1.34.0, < 1.38.2

Cross references:

• Module tailscale.com appears in issue x/vulndb: potential Go vuln in tailscale.com/cmd: GHSA-qccm-wmcq-pwr6 #1119 NOT_IMPORTABLE
• Module tailscale.com appears in issue x/vulndb: potential Go vuln in tailscale.com/cmd: GHSA-vqp6-rc3h-83cp #1120 NOT_IMPORTABLE

See doc/triage.md for instructions on how to triage this report.

modules:
  - module: tailscale.com
    versions:
      - introduced: 1.34.0
        fixed: 1.38.2
    packages:
      - package: tailscale.com
summary: Non-interactive Tailscale SSH sessions on FreeBSD may use the effective group
    ID of the tailscaled process
description: |+
    A vulnerability identified in the implementation of Tailscale SSH in FreeBSD allowed commands to be run with a higher privilege group ID than that specified by Tailscale SSH access rules.

    **Affected platforms**: FreeBSD

    **Patched Tailscale client versions**: v1.38.2 or later

    ### What happened?
    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.

    ### Who is affected?
    9 tailnets with 22 FreeBSD nodes running Tailscale SSH since Tailscale v1.34 (released on 2022-12-04) may have had Tailscale SSH sessions with a higher privilege group ID than that specified in Tailscale SSH access rules.

    We have notified the affected organizations where we have [security contacts](https://tailscale.com/kb/1224/contact-preferences/#setting-the-security-issues-email).

    ### What is the impact?
    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.

    ### What do I need to do?
    If you are running Tailscale on FreeBSD, upgrade to v1.38.2 or later to remediate the issue. Admins of a tailnet can view [FreeBSD nodes with unpatched versions](https://#.tailscale.com/admin/machines?q=version%3A%3C1.38.2+freebsd) in the admin console.

    To update the local ports tree in advance of what's available upstream, you can:

    1. `cd /usr/ports/security/tailscale`
    2. edit the Makefile to set `PORTVERSION` to `1.38.2`
    3. `make makesum`
    4. `make install`

    Tailscale SSH on other platforms is not affected.

    ### Credits
    We would like to thank [Ryan Belgrave](https://www.linkedin.com/in/rbelgrave/) for reporting this issue.

    ### References
    * [TS-2023-003](https://tailscale.com/security-bulletins/#ts-2023-003)


cves:
  - CVE-2023-28436
ghsas:
  - GHSA-vfgq-g5x8-g595
references:
  - advisory: https://github.com/tailscale/tailscale/security/advisories/GHSA-vfgq-g5x8-g595
  - fix: https://github.com/tailscale/tailscale/commit/d00c046b723dff6e3775d7d35f891403ac21a47d
  - web: https://github.com/tailscale/tailscale/releases/tag/v1.38.2
  - web: https://tailscale.com/security-bulletins/#ts-2023-003
  - advisory: https://github.com/advisories/GHSA-vfgq-g5x8-g595

[gopherbot]

Change https://go.dev/cl/479297 mentions this issue: data/excluded: batch add GO-2023-1674, GO-2023-1671, GO-2023-1670, GO-2023-1669, GO-2023-1668, GO-2023-1667, GO-2023-1662, GO-2023-1661, GO-2023-1660, GO-2023-1659, GO-2023-1658, GO-2023-1657, GO-2023-1656, GO-2023-1655, GO-2023-1654, GO-2023-1653, GO-2023-1673, GO-2023-1666, GO-2023-1665

[gopherbot]

Change https://go.dev/cl/592760 mentions this issue: data/reports: unexclude 75 reports

[gopherbot]

Change https://go.dev/cl/606784 mentions this issue: data/reports: unexclude 20 reports (4)