DEBIAN-CVE-2018-13405

Advisory lineage Upstream: 1 Downstream: 3
Upstream
CVE-2018-13405
Published: 06 Jul 2018, 14:29
Last modified:28 Apr 2026, 20:18

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Jul 2018, 14:29
Published
Vulnerability first disclosed
28 Apr 2026, 20:18
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•linux

    < 4.17.6-1 | < 4.17.6-1 | < 4.17.6-1 | < 4.17.6-1

References (1)