comedi: me4000: Fix potential overrun of firmware buffer
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.19
References 8
git.kernel.org
- stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6
- stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2
- stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561
- stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655
- stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5
- stable/c/eae19cab44204537f79146f15a51811b13227c38
- stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d
- stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7