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FreeBSD: VID-C02B8DB5-771B-11EF-9A62-002590C1F29C (CVE-2024-6759): FreeBSD -- NFS client accepts file names containing path separators

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FreeBSD: VID-C02B8DB5-771B-11EF-9A62-002590C1F29C (CVE-2024-6759): FreeBSD -- NFS client accepts file names containing path separators

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
08/07/2024
Created
09/24/2024
Added
09/22/2024
Modified
09/22/2024

Description

When mounting a remote filesystem using NFS, the kernel did not sanitize remotely provided filenames for the path separator character, "/". This allows readdir(3) and related functions to return filesystem entries with names containing additional path components.

The lack of validation described above gives rise to a confused deputy problem. For example, a program copying files from an NFS mount could be tricked into copying from outside the intended source directory, and/or to a location outside the intended destination directory.

Solution(s)

  • freebsd-upgrade-base-13_3-release-p5
  • freebsd-upgrade-base-14_0-release-p9
  • freebsd-upgrade-base-14_1-release-p3

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