Improper Access Control Affecting qemu-tests package, versions <2:6.1.0-14.amzn2022.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.04% (63rd percentile)

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  • Snyk IDSNYK-AMZN2022-QEMUTESTS-2997955
  • published29 Aug 2022
  • disclosed6 Jul 2018

Introduced: 6 Jul 2018

CVE-2018-13405  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2022 qemu-tests to version 2:6.1.0-14.amzn2022.0.1 or higher.
This issue was patched in ALAS2022-2022-050.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-tests package and not the qemu-tests package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2022 relevant fixed versions and status.

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.

References

CVSS Base Scores

version 3.1