Execution with Unnecessary Privileges Affecting kernel-rt-debug-kvm package, versions <0:3.10.0-514.26.1.rt56.442.el7
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-CENTOS7-KERNELRTDEBUGKVM-2082023
- published26 Jul 2021
- disclosed12 Jan 2017
Introduced: 12 Jan 2017
CVE-2017-2583 (opens in a new tab)How to fix?
Upgrade Centos:7 kernel-rt-debug-kvm to version 0:3.10.0-514.26.1.rt56.442.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5 improperly emulates a "MOV SS, NULL selector" instruction, which allows guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application.
References
- http://www.securityfocus.com/bid/95673
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=33ab91103b3415e12457e3104f0e4517ce12d0f3
- https://bugzilla.redhat.com/show_bug.cgi?id=1414735
- https://github.com/torvalds/linux/commit/33ab91103b3415e12457e3104f0e4517ce12d0f3
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5
- https://access.redhat.com/security/cve/CVE-2017-2583
- http://www.debian.org/security/2017/dsa-3791
- http://www.openwall.com/lists/oss-security/2017/01/19/2
- https://access.redhat.com/errata/RHSA-2017:1616
- https://usn.ubuntu.com/3754-1/