Description
util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
util-linux util-linux
< 2.41.4affected
References
- https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5 ↗
- https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623 ↗
- https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31 ↗
- https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af ↗
- https://github.com/util-linux/util-linux/releases/tag/v2.41.4 ↗