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Red Hat: CVE-2018-13405: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

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Red Hat: CVE-2018-13405: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
07/06/2018
Created
03/19/2019
Added
10/31/2018
Modified
03/03/2021

Description

The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

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