Debian DSA-4134-1 : util-linux - security update

High Nessus Plugin ID 107279

Synopsis

The remote Debian host is missing a security-related update.

Description

Bjorn Bosselmann discovered that the umount bash completion from util-linux does not properly handle embedded shell commands in a mountpoint name. An attacker with rights to mount filesystems can take advantage of this flaw for privilege escalation if a user (in particular root) is tricked into using the umount completion while a specially crafted mount is present.

Solution

Upgrade the util-linux packages.

For the stable distribution (stretch), this problem has been fixed in version 2.29.2-1+deb9u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892179

https://security-tracker.debian.org/tracker/source-package/util-linux

https://packages.debian.org/source/stretch/util-linux

https://www.debian.org/security/2018/dsa-4134

Plugin Details

Severity: High

ID: 107279

File Name: debian_DSA-4134.nasl

Version: 1.5

Type: local

Agent: unix

Published: 2018/03/12

Updated: 2018/11/13

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3.0

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:util-linux, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2018/03/10

Reference Information

CVE: CVE-2018-7738

DSA: 4134