Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: udf: validate sparing table length as an entry count, not a byte count udf_load_sparable_map() accepts a sparing table when sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > sb->s_blocksize is false, i.e. it treats reallocationTableLen as a number of BYTES that must fit in the block. But the table is walked as an array of 8-byte sparingEntry elements: for (i = 0; i < le16_to_cpu(st->reallocationTableLen); i++) { struct sparingEntry *entry = &st->mapEntry[i]; ... entry->origLocation ... } in udf_get_pblock_spar15() and udf_relocate_blocks(). A reallocationTableLen of N therefore passes the check whenever sizeof(*st) + N <= blocksize, yet the consumers index sizeof(*st) + N * sizeof(struct sparingEntry) bytes -- up to ~8x the block. On a crafted UDF image this is an out-of-bounds read in udf_get_pblock_spar15(); udf_relocate_blocks() additionally feeds the same length to udf_update_tag(), whose crc_itu_t() reads far past the block, and its memmove() through st->mapEntry[] is an out-of-bounds write. Validate reallocationTableLen as the entry count it is, with struct_size().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before eeb0f3e193f8e523d03e4c9e084f6b4875f50e8e; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 0a9b79a951cfd70a9d31ca01ae2d08a20bb730e9; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 2d726135099313958f8975532a2e15322ff150ce; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 7285276aa50d2839afb5957ffd491ad282dc8f72; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 2a219acb2ce674d99bbd1b7b35ed8c384dac7200; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 04f4599a9efb90992d072a814960edf0cd62805d; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 7f7774b9da0ef17b87bfa238cf966ad0b3376150; affected 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 before 3ec997bd5508e9b25210b5bbec89031629cdb093; affected e240873cb4a9fd18de60a817100a96fe670d4359; affected 9ae30e324a96d0328a575329d7a95a09b3318601; affected b1c5701ad6b3e5d21d16f65475651cfaaa41e7aa; affected a9f1af04f086656246f30354fb4564ce3b08c4a0; affected 4836ee563d65bb492f907cbe267a5761b9693e4d; affected 2.6.32.60 before 2.6.33; affected 2.6.34.14 before 2.6.35; affected 3.0.37 before 3.1; affected 3.2.23 before 3.3; affected 3.4.5 before 3.5 |
| Linux / Linux | affected 3.5; unaffected 0 before 3.5; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/eeb0f3e193f8e523d03e4c9e084f6b4875f50e8e
- https://git.kernel.org/stable/c/0a9b79a951cfd70a9d31ca01ae2d08a20bb730e9
- https://git.kernel.org/stable/c/2d726135099313958f8975532a2e15322ff150ce
- https://git.kernel.org/stable/c/7285276aa50d2839afb5957ffd491ad282dc8f72
- https://git.kernel.org/stable/c/2a219acb2ce674d99bbd1b7b35ed8c384dac7200
- https://git.kernel.org/stable/c/04f4599a9efb90992d072a814960edf0cd62805d
- https://git.kernel.org/stable/c/7f7774b9da0ef17b87bfa238cf966ad0b3376150
- https://git.kernel.org/stable/c/3ec997bd5508e9b25210b5bbec89031629cdb093
ADP enrichment
No English description supplied.
No references supplied.