Release Date: | 2024-11-07 |
In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ('xfrm: Validate address prefix lengths in the xfrm selector.') syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.
See more information about CVE-2024-50142 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
Base Score: | 5.5 |
Vector String: | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Version: | 3.1 |
Attack Vector: | Local |
Attack Complexity: | Low |
Privileges Required: | Low |
User Interaction: | None |
Scope: | Unchanged |
Confidentiality: | None |
Integrity: | None |
Availability: | High |
Platform | Errata | Release Date |
Oracle Linux version 7 (kernel-uek) | ELSA-2024-12884 | 2024-12-16 |
Oracle Linux version 8 (kernel) | ELSA-2024-10943 | 2024-12-11 |
Oracle Linux version 8 (kernel-uek) | ELSA-2024-12884 | 2024-12-16 |
Oracle Linux version 8 (kernel-uek) | ELSA-2024-12887 | 2024-12-18 |
Oracle Linux version 9 (kernel) | ELSA-2024-11486 | 2025-01-06 |
Oracle Linux version 9 (kernel-uek) | ELSA-2024-12887 | 2024-12-18 |
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