Is CVE-2018-13405 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 1%.

What products does CVE-2018-13405 affect?

Tracked products affected include Fedora. Check the version you run to see whether it is affected.

How do I fix CVE-2018-13405?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2018-13405

Q: What is CVE-2018-13405?

CVE-2018-13405 is a high-severity software vulnerability (Improper privilege management) with a CVSS score of 7.8. 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

HIGH severity · CVSS 7.8 · Improper privilege management

7.8CVSS HIGH

Summary

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.

Impact & exploitability

Attack vectorLocal

Attack complexityLow

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)1%

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Fedora

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7 ↗

CVE-2018-13405

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information