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GLSA-202305-29 : squashfs-tools: Multiple Vulnerabilities

high Nessus Plugin ID 176469

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Description

The remote host is affected by the vulnerability described in GLSA-202305-29 (squashfs-tools: Multiple Vulnerabilities)

 - squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory, and thus allows writing to locations outside of the destination. (CVE-2021-40153)

 - squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory, and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem. (CVE-2021-41072)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

All squashfs-tools users should upgrade to the latest version:

 # emerge --sync # emerge --ask --oneshot --verbose >=sys-fs/squashfs-tools-4.5_p20210914

See Also

https://security.gentoo.org/glsa/202305-29

https://bugs.gentoo.org/show_bug.cgi?id=810706

https://bugs.gentoo.org/show_bug.cgi?id=813654

Plugin Details

Severity: High

ID: 176469

File Name: gentoo_GLSA-202305-29.nasl

Version: 1.0

Type: local

Published: 5/30/2023

Updated: 5/30/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

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

CVSS Score Source: CVE-2021-41072

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:squashfs-tools, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/30/2023

Vulnerability Publication Date: 8/27/2021

Reference Information

CVE: CVE-2021-40153, CVE-2021-41072