Description
In the Linux kernel, the following vulnerability has been resolved: EFI/CPER: don't dump the entire memory region The current logic at cper_print_fw_err() doesn't check if the error record length is big enough to handle offset. On a bad firmware, if the ofset is above the actual record, length -= offset will underflow, making it dump the entire memory. The end result can be: - the logic taking a lot of time dumping large regions of memory; - data disclosure due to the memory dumps; - an OOPS, if it tries to dump an unmapped memory region. Fix it by checking if the section length is too small before doing a hex dump. [ rjw: Subject tweaks ]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 02de64ab54b4bb0f1b21bb324aeff3b08612be33affected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 0e09b522f2622841389c3b2f9ac4969e35c0809daffected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 64ae5aaa7ac93c83da456039e8ec747bfa8a7cffaffected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 5a9b1dda8481b82851a655c3bcc5b44879b95334affected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 7780c0bad2a3a70a8c0113a33c02f4151d901eb3affected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91affected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 54e131db4cdffd946db890ff33ff2647053fd4f6affected3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 to < 55cc6fe5716f678f06bcb95140882dfa684464ecaffected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.16 to ≤ 6.18.*unaffected6.19.6 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33 ↗
- https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d ↗
- https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff ↗
- https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334 ↗
- https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3 ↗
- https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91 ↗
- https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6 ↗
- https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec ↗