Information Exposure Affecting perf package, versions <0:4.18.0-193.1.2.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-PERF-3746813
- published 26 Jul 2021
- disclosed 24 Feb 2020
Introduced: 24 Feb 2020
CVE-2020-2732 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-193.1.2.el8_2 or higher.
This issue was patched in RHSA-2020:2102.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.
References
- https://access.redhat.com/security/cve/CVE-2020-2732
- https://www.debian.org/security/2020/dsa-4667
- https://www.debian.org/security/2020/dsa-4698
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
- https://linux.oracle.com/errata/ELSA-2020-5540.html
- https://linux.oracle.com/errata/ELSA-2020-5542.html
- https://linux.oracle.com/errata/ELSA-2020-5543.html
- https://www.openwall.com/lists/oss-security/2020/02/25/3
- https://www.spinics.net/lists/kvm/msg208259.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://access.redhat.com/errata/RHSA-2020:2102