Out-of-Bounds Affecting kernel package, versions <0:4.14.42-61.37.amzn2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2-KERNEL-1662848
- published27 Sept 2021
- disclosed27 Mar 2018
Introduced: 27 Mar 2018
CVE-2018-1091 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.42-61.37.amzn2 or higher.
This issue was patched in ALAS2-2018-1023.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70
- http://openwall.com/lists/oss-security/2018/03/27/4
- https://access.redhat.com/security/cve/cve-2018-1091
- https://bugzilla.redhat.com/show_bug.cgi?id=1558149
- https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70
- https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1091
- https://access.redhat.com/errata/RHSA-2018:1318