SUSE SLED15 / SLES15 / openSUSE 15 Security Update : squashfs (SUSE-SU-2023:4591-1)

high Nessus Plugin ID 186334

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4591-1 advisory.

- CVE-2015-4645,CVE-2015-4646: Multiple buffer overflows fixed in squashfs-tools (bsc#935380)
- CVE-2021-40153: Fixed an issue where an attacker might have been able to write a file outside of destination (bsc#1189936)
- CVE-2021-41072: Fixed an issue where an attacker might have been able to write a file outside the destination directory via a symlink (bsc#1190531).

update to 4.6.1:

* Race condition which can cause corruption of the 'fragment table' fixed. This is a regression introduced in August 2022, and it has been seen when tailend packing is used (-tailends option).
* Fix build failure when the tools are being built without extended attribute (XATTRs) support.
* Fix XATTR error message when an unrecognised prefix is found
* Fix incorrect free of pointer when an unrecognised XATTR prefix is found.
* Major improvements in extended attribute handling, pseudo file handling, and miscellaneous new options and improvements
* Extended attribute handling improved in Mksquashfs and Sqfstar
* New Pseudo file xattr definition to add extended attributes to files.
* New xattrs-add Action to add extended attributes to files
* Extended attribute handling improved in Unsquashfs
* Other major improvements
* Unsquashfs can now output Pseudo files to standard out.
* Mksquashfs can now input Pseudo files from standard in.
* Squashfs filesystems can now be converted (different block size compression etc) without unpacking to an intermediate filesystem or mounting, by piping the output of Unsquashfs to Mksquashfs.
* Pseudo files are now supported by Sqfstar.
* 'Non-anchored' excludes are now supported by Unsquashfs.

update to 4.5.1 (bsc#1190531, CVE-2021-41072):

* This release adds Manpages for Mksquashfs(1), Unsquashfs(1), Sqfstar(1) and Sqfscat(1).
* The -help text output from the utilities has been improved and extended as well (but the Manpages are now more comprehensive).
* CVE-2021-41072 which is a writing outside of destination exploit, has been fixed.
* The number of hard-links in the filesystem is now also displayed by Mksquashfs in the output summary.
* The number of hard-links written by Unsquashfs is now also displayed in the output summary.
* Unsquashfs will now write to a pre-existing destination directory, rather than aborting.
* Unsquashfs now allows '.' to used as the destination, to extract to the current directory.
* The Unsquashfs progress bar now tracks empty files and hardlinks, in addition to data blocks.
* -no-hardlinks option has been implemented for Sqfstar.
* More sanity checking for 'corrupted' filesystems, including checks for multiply linked directories and directory loops.
* Options that may cause filesystems to be unmountable have been moved into a new 'experts' category in the Mksquashfs help text (and Manpage).
* Maximum cpiostyle filename limited to PATH_MAX. This prevents attempts to overflow the stack, or cause system calls to fail with a too long pathname.
* Don't always use 'max open file limit' when calculating length of queues, as a very large file limit can cause Unsquashfs to abort. Instead use the smaller of max open file limit and cache size.
* Fix Mksquashfs silently ignoring Pseudo file definitions when appending.
* Don't abort if no XATTR support has been built in, and there's XATTRs in the filesystem. This is a regression introduced in 2019 in Version 4.4.
* Fix duplicate check when the last file block is sparse.

update to 4.5:

* Mksquashfs now supports 'Actions'.
* New sqfstar command which will create a Squashfs image from a tar archive.
* Tar style handling of source pathnames in Mksquashfs.
* Cpio style handling of source pathnames in Mksquashfs.
* New option to throttle the amount of CPU and I/O.
* Mksquashfs now allows no source directory to be specified.
* New Pseudo file 'R' definition which allows a Regular file o be created with data stored within the Pseudo file.
* Symbolic links are now followed in extract files
* Unsquashfs now supports 'exclude' files.
* Max depth traversal option added.
* Unsquashfs can now output a 'Pseudo file' representing the input Squashfs filesystem.
* New -one-file-system option in Mksquashfs.
* New -no-hardlinks option in Mksquashfs.
* Exit code in Unsquashfs changed to distinguish between non-fatal errors (exit 2), and fatal errors (exit 1).
* Xattr id count added in Unsquashfs '-stat' output.
* Unsquashfs 'write outside directory' exploit fixed.
* Error handling in Unsquashfs writer thread fixed.
* Fix failure to truncate destination if appending aborted.
* Prevent Mksquashfs reading the destination file.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

Solution

Update the affected squashfs package.

Plugin Details

Severity: High

ID: 186334

File Name: suse_SU-2023-4591-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 11/28/2023

Updated: 6/25/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.04

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: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:squashfs

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/27/2023

Vulnerability Publication Date: 6/17/2015

Reference Information

CVE: CVE-2015-4645, CVE-2015-4646, CVE-2021-40153, CVE-2021-41072

SuSE: SUSE-SU-2023:4591-1

Detections

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