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Debian Security Advisory DSA 4134-1 (util-linux - security update)

Information

Severity

Severity

High

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.2

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

3 years ago

Summary

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.

Affected Software

Affected Software

util-linux on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (stretch), this problem has been fixed in version 2.29.2-1+deb9u1. We recommend that you upgrade your util-linux packages. For the detailed security status of util-linux please refer to its security tracker page linked in the references.

Common Vulnerabilities and Exposures (CVE)