Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6268f01ae989013671b526c883e92655342c6f6f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9aafba2f49e1fcccc2018816f5836a609c925879; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 335957df4ed60f02a2ec0432fbedbf0cc7241d8b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 37537e42e6df387398bee85cb85070cc80bb1e10; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4cefe32639933d652614b0bd50f818f9af4af78f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d42bec6e4f6d6d658be365539400b3314b76b2a7; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.141 through 6.6.*; unaffected 6.12.91 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6268f01ae989013671b526c883e92655342c6f6f
- https://git.kernel.org/stable/c/9aafba2f49e1fcccc2018816f5836a609c925879
- https://git.kernel.org/stable/c/335957df4ed60f02a2ec0432fbedbf0cc7241d8b
- https://git.kernel.org/stable/c/37537e42e6df387398bee85cb85070cc80bb1e10
- https://git.kernel.org/stable/c/4cefe32639933d652614b0bd50f818f9af4af78f
- https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d
- https://git.kernel.org/stable/c/d42bec6e4f6d6d658be365539400b3314b76b2a7
- https://git.kernel.org/stable/c/4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.