SUSE-SU-2023:4591-1

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SUSE-SU-2023:4591-1

Summary: Security update for squashfs

Details: 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.

References: https://www.suse.com/support/update/announcement/2023/suse-su-20234591-1/, https://bugzilla.suse.com/1189936, https://bugzilla.suse.com/1190531, https://bugzilla.suse.com/935380, https://www.suse.com/security/cve/CVE-2015-4645, https://www.suse.com/security/cve/CVE-2015-4646, https://www.suse.com/security/cve/CVE-2021-40153, https://www.suse.com/security/cve/CVE-2021-41072