Description
In the Linux kernel, the following vulnerability has been resolved: hfsplus: validate thread record before delete key rebuild hfsplus_delete_cat() is called with str == NULL when the last open reference to an unlinked HFS+ hardlink backing inode is closed. In that case, the function finds the catalog thread by CNID and rebuilds the catalog key from thread.nodeName. That reconstruction path reads thread.nodeName.length directly from the catalog B-tree into fd.search_key and then copies length * 2 bytes into fd.search_key->cat.name.unicode. It does not first check that the found record is a thread record or that its size matches the thread name. A corrupted image can therefore provide an oversized thread name length and make hfs_bnode_read() write past the catalog search-key allocation. Read the CNID record through hfsplus_brec_read_cat(), which bounds the record read to sizeof(hfsplus_cat_entry) and verifies that a thread record's size exactly matches nodeName.length. Together, these checks ensure an accepted thread name fits HFSPLUS_MAX_STRLEN. Reject non-thread records before building the delete key from the validated thread name. Share the thread-record-type helper between hfsplus_find_cat() and hfsplus_delete_cat().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 33cda0036bc683fc888c20b04a5fc030e3e8413baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b9729c51a8b67f8b20b8a8cf395da4be63a0c15baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < af48abc1b00d865c3f4c4d76b901c44115cb7162affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e20f3b749ad241df77ec1c3e13a9c22209aa1eb3affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7898beee166c1145c0bca364d687b8437435bf1aaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e31985c67ba00a59d9b1340af473c1dbe6c87856affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 473ea7aa35615829f0de7a71e8691d69dc24e328affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/33cda0036bc683fc888c20b04a5fc030e3e8413b ↗
- https://git.kernel.org/stable/c/b9729c51a8b67f8b20b8a8cf395da4be63a0c15b ↗
- https://git.kernel.org/stable/c/af48abc1b00d865c3f4c4d76b901c44115cb7162 ↗
- https://git.kernel.org/stable/c/e20f3b749ad241df77ec1c3e13a9c22209aa1eb3 ↗
- https://git.kernel.org/stable/c/7898beee166c1145c0bca364d687b8437435bf1a ↗
- https://git.kernel.org/stable/c/e31985c67ba00a59d9b1340af473c1dbe6c87856 ↗
- https://git.kernel.org/stable/c/473ea7aa35615829f0de7a71e8691d69dc24e328 ↗
- https://git.kernel.org/stable/c/e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20 ↗