Improper Access Control Affecting bpftool package, versions <0:3.10.0-957.el7


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (1st percentile)

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  • Snyk IDSNYK-CENTOS7-BPFTOOL-2111235
  • published26 Jul 2021
  • disclosed5 Jul 2018

Introduced: 5 Jul 2018

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

How to fix?

Upgrade Centos:7 bpftool to version 0:3.10.0-957.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos. See How to fix? for Centos:7 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.

CVSS Scores

version 3.1