Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: comedi: me4000: Fix potential overrun of firmware buffer `me4000_xilinx_download()` loads the firmware that was requested by `request_firmware()`. It is possible for it to overrun the source buffer because it blindly trusts the file format. It reads a data stream length from the first 4 bytes into variable `file_length` and reads the data stream contents of length `file_length` from offset 16 onwards. Add a test to ensure that the supplied firmware is long enough to contain the header and the data stream. On failure, log an error and return `-EINVAL`. Note: The firmware loading was totally broken before commit ac584af59945 ("staging: comedi: me4000: fix firmware downloading"), but that is the most sensible target for this fix.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ac584af599452748187cf6d7865b1607c54ee443 before 8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6; affected ac584af599452748187cf6d7865b1607c54ee443 before 64b24b713e1a3ea6624480594b4f8c2ff86502f2; affected ac584af599452748187cf6d7865b1607c54ee443 before f72b5567f7c117b46b4058dc6a0c7554f8565561; affected ac584af599452748187cf6d7865b1607c54ee443 before 1603dd471f47762e9d1f52304edb3e49a7e62655; affected ac584af599452748187cf6d7865b1607c54ee443 before 99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5; affected ac584af599452748187cf6d7865b1607c54ee443 before eae19cab44204537f79146f15a51811b13227c38; affected ac584af599452748187cf6d7865b1607c54ee443 before de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d; affected ac584af599452748187cf6d7865b1607c54ee443 before 3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7 |
| Linux / Linux | affected 3.19; unaffected 0 before 3.19; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.168 through 6.1.*; unaffected 6.6.134 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6
- https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2
- https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561
- https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655
- https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5
- https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38
- https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d
- https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7