Externally Controlled Reference to a Resource in Another Sphere Affecting kernel-rt-modules-internal package, versions *
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTMODULESINTERNAL-3311660
- published 6 Feb 2023
- disclosed 3 Feb 2023
Introduced: 3 Feb 2023
CVE-2023-0045 Open this link in a new tabHow to fix?
There is no fixed version for Centos:8 kernel-rt-modules-internal.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-modules-internal package and not the kernel-rt-modules-internal package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176.
We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96
References
- https://access.redhat.com/security/cve/CVE-2023-0045
- https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96
- https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- https://security.netapp.com/advisory/ntap-20230714-0001/