Security update for squashfs

Announcement ID: SUSE-SU-2024:2463-1
Rating: important
References:
Cross-References:
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.

Description:

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: