Information Exposure Affecting bpftool package, versions <0:4.18.0-147.8.1.el8_1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-RHEL8-BPFTOOL-3676216
  • published26 Jul 2021
  • disclosed13 Sept 2019

Introduced: 13 Sep 2019

CVE-2019-15031  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:8 bpftool 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 bpftool package and not the bpftool 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.

CVSS Base Scores

version 3.1