SUSE: 2024:2463-1 important: squashfs Security Advisory Updates
Summary
## This update for squashfs fixes the following issues: * 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. ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2024-2463=1 ## Package List: * SUSE Linux Enterprise Micro 5.5 (ppc64le) * squashfs-debugsource-4.6.1-150300.3.3.1 * squashfs-debuginfo-4.6.1-150300.3.3.1 * squashfs-4.6.1-150300.3.3.1
References
* bsc#1189936
* bsc#1190531
* bsc#935380
Cross-
* CVE-2015-4645
* CVE-2015-4646
* CVE-2021-40153
* CVE-2021-41072
CVSS scores:
* CVE-2015-4645 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2015-4645 ( NVD ): 5.5 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2015-4646 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2021-40153 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
* CVE-2021-40153 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
* CVE-2021-41072 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
* CVE-2021-41072 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Affected Products:
* SUSE Linux Enterprise Micro 5.5
An update that solves four vulnerabilities can now be installed.
##
* https://www.suse.com/security/cve/CVE-2015-4645.html
* https://www.suse.com/security/cve/CVE-2015-4646.html
* https://www.suse.com/security/cve/CVE-2021-40153.html
* https://www.suse.com/security/cve/CVE-2021-41072.html
* https://bugzilla.suse.com/show_bug.cgi?id=1189936
* https://bugzilla.suse.com/show_bug.cgi?id=1190531
* https://bugzilla.suse.com/show_bug.cgi?id=935380
![Dist Suse](/images/distros/dist-suse.gif)