Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 02de64ab54b4bb0f1b21bb324aeff3b08612be33; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 0e09b522f2622841389c3b2f9ac4969e35c0809d; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 5a9b1dda8481b82851a655c3bcc5b44879b95334; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 7780c0bad2a3a70a8c0113a33c02f4151d901eb3; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 54e131db4cdffd946db890ff33ff2647053fd4f6; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 55cc6fe5716f678f06bcb95140882dfa684464ec |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
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