Incorrect Authorization Affecting bpftool package, versions <0:4.18.0-348.el8


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.05% (22nd percentile)

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  • Snyk IDSNYK-CENTOS8-BPFTOOL-2139974
  • published26 Jul 2021
  • disclosed18 Apr 2021

Introduced: 18 Apr 2021

CVE-2021-29155  (opens in a new tab)
CWE-863  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Centos:8 bpftool to version 0:4.18.0-348.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

References

CVSS Scores

version 3.1