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PostPosted: Wed Mar 07, 2018 7:26 pm    Post subject: [ GLSA 201803-02 ] util-linux Reply with quote

Gentoo Linux Security Advisory

Title: util-linux: User-assisted execution of arbitrary code (GLSA 201803-02)
Severity: high
Exploitable: local, remote
Date: 2018-03-07
Bug(s): #649812
ID: 201803-02

Synopsis

A vulnerability was discovered in util-linux, which could
potentially lead to the execution of arbitrary code.


Background

util-linux is a suite of Linux programs including mount and umount,
programs used to mount and unmount filesystems.


Affected Packages

Package: sys-apps/util-linux
Vulnerable: < 2.30.2-r1
Unaffected: >= 2.30.2-r1
Architectures: All supported architectures


Description

It was discovered that the umount bash-completion as provided by
util-linux does not escap mount point paths.


Impact

An attacker controlling a volume label could entice a user with
privileges to mount/umount filesystems to use umount command with auto
completion, possibly resulting in execution of arbitrary code with root
privileges.


Workaround

Disable Bash-completion or remove
“/usr/share/bash-completion/completions/umount”.


Resolution

All util-linux users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-apps/util-linux-2.30.2-r1"
   


References

CVE-2018-7738
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