Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: udf: validate VAT header length against the VAT inode size udf_load_vat() takes the virtual partition's start offset straight from the on-disk VAT 2.0 header without checking it against the VAT inode size: map->s_type_specific.s_virtual.s_start_offset = le16_to_cpu(vat20->lengthHeader); map->s_type_specific.s_virtual.s_num_entries = (sbi->s_vat_inode->i_size - map->s_type_specific.s_virtual.s_start_offset) >> 2; lengthHeader is a fully attacker-controlled 16-bit value. If it exceeds the VAT inode size, the s_num_entries subtraction underflows to a huge count, which defeats the "block > s_num_entries" bound in udf_get_pblock_virt15(); and on the ICB-inline path that function reads ((__le32 *)(iinfo->i_data + s_start_offset))[block] so a large s_start_offset indexes past the inode's in-ICB data. Mounting a crafted UDF image with a virtual (VAT) partition then triggers an out-of-bounds read. Reject a VAT whose header length does not leave room for at least one entry within the VAT inode.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fa5e08156335d0687c85b4e724db9448fb166601 before 0ad2d09a8d66fa8dc6f9b70d660b5fb4478ea934; affected fa5e08156335d0687c85b4e724db9448fb166601 before 883962731420ec271ed8c1cd76524f4b17faa982; affected fa5e08156335d0687c85b4e724db9448fb166601 before 2900e02a0dd4fc30ac9840e7ce4ca0b041ab0d63; affected fa5e08156335d0687c85b4e724db9448fb166601 before bb0d384c1f42a5b7ace0bd88fee80b9bb1d49acb; affected fa5e08156335d0687c85b4e724db9448fb166601 before 55287a3555ff0515b3aff181d2c08c0462a41709; affected fa5e08156335d0687c85b4e724db9448fb166601 before e610fb113cdfa8bf4247c9bf4f2337b81ad4ddad; affected fa5e08156335d0687c85b4e724db9448fb166601 before 74580fdf022909e184223cacc364feb826982d96; affected fa5e08156335d0687c85b4e724db9448fb166601 before d8202786b3d75125c84ebc4de6d946f92fde0ee8 |
| Linux / Linux | affected 2.6.26; unaffected 0 before 2.6.26; 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/0ad2d09a8d66fa8dc6f9b70d660b5fb4478ea934
- https://git.kernel.org/stable/c/883962731420ec271ed8c1cd76524f4b17faa982
- https://git.kernel.org/stable/c/2900e02a0dd4fc30ac9840e7ce4ca0b041ab0d63
- https://git.kernel.org/stable/c/bb0d384c1f42a5b7ace0bd88fee80b9bb1d49acb
- https://git.kernel.org/stable/c/55287a3555ff0515b3aff181d2c08c0462a41709
- https://git.kernel.org/stable/c/e610fb113cdfa8bf4247c9bf4f2337b81ad4ddad
- https://git.kernel.org/stable/c/74580fdf022909e184223cacc364feb826982d96
- https://git.kernel.org/stable/c/d8202786b3d75125c84ebc4de6d946f92fde0ee8
ADP enrichment
No English description supplied.
No references supplied.