Bug 2324315 (CVE-2024-50142)
| Summary: | CVE-2024-50142 kernel: xfrm: validate new SA's prefixlen using SA family when sel.family is unset | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | dfreiber, drow, jburrell, vkumar |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2324402 | ||
| Bug Blocks: | |||
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024110743-CVE-2024-50142-e0dc@gregkh/T This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:10944 https://access.redhat.com/errata/RHSA-2024:10944 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:10943 https://access.redhat.com/errata/RHSA-2024:10943 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2024:11486 https://access.redhat.com/errata/RHSA-2024:11486 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2025:1658 https://access.redhat.com/errata/RHSA-2025:1658 |
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.