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F5 Networks: K00854051 (CVE-2018-13405): Linux kernel vulnerability CVE-2018-13405

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F5 Networks: K00854051 (CVE-2018-13405): Linux kernel vulnerability CVE-2018-13405

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
07/06/2018
Created
05/14/2019
Added
05/10/2019
Modified
09/16/2019

Description

The inode_init_owner function in fs/inode.c in the Linux kernel through 4.17.4 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)

  • f5-big-ip-upgrade-latest

References

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