Information Exposure Affecting perf package, versions <0:4.18.0-147.8.1.el8_1
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Test your applications- Snyk ID SNYK-RHEL8-PERF-3675044
- published 26 Jul 2021
- disclosed 13 Sep 2019
Introduced: 13 Sep 2019
CVE-2019-15031 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-147.8.1.el8_1 or higher.
This issue was patched in RHSA-2020:1372.
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.
In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via an interrupt. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process, because MSR_TM_ACTIVE is misused in arch/powerpc/kernel/process.c.
References
- https://security.netapp.com/advisory/ntap-20191004-0001/
- https://access.redhat.com/security/cve/CVE-2019-15031
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a8318c13e79badb92bc6640704a64cc022a6eb97
- http://www.openwall.com/lists/oss-security/2019/09/10/4
- https://access.redhat.com/errata/RHSA-2020:1372
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://usn.ubuntu.com/4135-1/
- https://usn.ubuntu.com/4135-2/