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Debian: Security Advisory for squashfs-tools (DSA-4967-1)

Information

Severity

Severity

High

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.5

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

2 years ago

Modified

Modified

2 years ago

Summary

The remote host is missing an update for the 'squashfs-tools' package(s) announced via the DSA-4967-1 advisory.

Insight

Insight

Etienne Stalmans discovered that unsquashfs in squashfs-tools, the tools to create and extract Squashfs filesystems, does not validate filenames for traversal outside of the destination directory. An attacker can take advantage of this flaw for writing to arbitrary files to the filesystem if a malformed Squashfs image is processed.

Affected Software

Affected Software

'squashfs-tools' package(s) on Debian Linux.

Detection Method

Detection Method

Checks if a vulnerable package version is present on the target host.

Solution

Solution

For the oldstable distribution (buster), this problem has been fixed in version 1:4.3-12+deb10u1. For the stable distribution (bullseye), this problem has been fixed in version 1:4.4-2+deb11u1. We recommend that you upgrade your squashfs-tools packages.

Common Vulnerabilities and Exposures (CVE)