Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound attr_off in UpdateResidentValue against data_off In do_action()'s UpdateResidentValue case (fslog.c:3307), lrh->attr_off and lrh->redo_len come from the on-disk LRH. When they satisfy aoff + dlen < attr->res.data_off, the assignment attr->res.data_size = cpu_to_le32(aoff + dlen - data_off); underflows to ~4 GiB (e.g. 0xFFFFFFF9 when aoff=0x10, dlen=1, data_off=0x18). Subsequent code that reads attr->res.data_size to walk the resident attribute payload would then read up to 4 GiB past the 1024-byte MFT record allocation. The existing mi_enum_attr() defense in fs/ntfs3/record.c:287 catches the corrupted data_size on the next attribute walk and fails the mount, but only on the path that walks all attributes. A read site that picks an attribute by name and reads its data_size without re-validating is not covered. Validate aoff against data_off and asize at the source. Reproduced under UML+KASAN on mainline 8d90b09e6741 via pr_warn-only probe: with aoff=0x10 and data_off=0x18, the post-assignment data_size is 0xfffffff9 (mount then fails at -22 from mi_enum_attr). [almaz.alexandrovich@paragon-software.com: clang-formatted the changes]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b46acd6a6a627d876898e1c84d3f84902264b445 before ab8761676d638c5be170aaf91b7ffdd451236616; affected b46acd6a6a627d876898e1c84d3f84902264b445 before 53c12f178f584dc5f836ffe2782138a6e9348ed9; affected b46acd6a6a627d876898e1c84d3f84902264b445 before 546518468e6c9ea469669eef78f8cc380ad6e2ca; affected b46acd6a6a627d876898e1c84d3f84902264b445 before 97758fd9756b5f09e9ddc6a5f6a569041acc8421; affected b46acd6a6a627d876898e1c84d3f84902264b445 before 50b5e83384e7fed3d11d18b79ff350e9d6d89861; affected b46acd6a6a627d876898e1c84d3f84902264b445 before a89c66674283a0293c0f266dc57087a6114371a3; affected b46acd6a6a627d876898e1c84d3f84902264b445 before d1570c48f49a693974d000251030370ee2e83539 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ab8761676d638c5be170aaf91b7ffdd451236616
- https://git.kernel.org/stable/c/53c12f178f584dc5f836ffe2782138a6e9348ed9
- https://git.kernel.org/stable/c/546518468e6c9ea469669eef78f8cc380ad6e2ca
- https://git.kernel.org/stable/c/97758fd9756b5f09e9ddc6a5f6a569041acc8421
- https://git.kernel.org/stable/c/50b5e83384e7fed3d11d18b79ff350e9d6d89861
- https://git.kernel.org/stable/c/a89c66674283a0293c0f266dc57087a6114371a3
- https://git.kernel.org/stable/c/d1570c48f49a693974d000251030370ee2e83539
ADP enrichment
No English description supplied.
No references supplied.