Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix buffer overflow when parsing NFS reparse points ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength. Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len. Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access. Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d5ecebc4900df7f6e8dff0717574668885110553 before 7b222d6cb87077faf56a687a72af1951cf78c8a9; affected d5ecebc4900df7f6e8dff0717574668885110553 before 73b078e3314d4854fd8286f3ba65c860ddd3a3dd; affected d5ecebc4900df7f6e8dff0717574668885110553 before 01cdddde39b065074fd48f07027757783cbf5b7d; affected d5ecebc4900df7f6e8dff0717574668885110553 before ec79e6170bcae8a6036a4b6960f5e7e59a785601; affected d5ecebc4900df7f6e8dff0717574668885110553 before c6db81c550cea0c73bd72ef55f579991e0e4ba07; affected d5ecebc4900df7f6e8dff0717574668885110553 before 803b3a39cb096d8718c0aebc03fd19f11c7dc919; affected d5ecebc4900df7f6e8dff0717574668885110553 before c173d47b69f07cd7ca08efb4e458adbd4725d8e9; affected d5ecebc4900df7f6e8dff0717574668885110553 before e2a8910af01653c1c268984855629d71fb81f404 |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.4.287 through 5.4.*; unaffected 5.10.231 through 5.10.*; unaffected 5.15.174 through 5.15.*; unaffected 6.1.120 through 6.1.*; unaffected 6.6.55 through 6.6.*; unaffected 6.10.14 through 6.10.*; unaffected 6.11.3 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7b222d6cb87077faf56a687a72af1951cf78c8a9
- https://git.kernel.org/stable/c/73b078e3314d4854fd8286f3ba65c860ddd3a3dd
- https://git.kernel.org/stable/c/01cdddde39b065074fd48f07027757783cbf5b7d
- https://git.kernel.org/stable/c/ec79e6170bcae8a6036a4b6960f5e7e59a785601
- https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07
- https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919
- https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9
- https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.