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Heap-based Buffer Overflow Affecting kernel-abi-whitelists package, versions <0:3.10.0-693.76.1.el7

Severity

 Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.14% (50th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELABIWHITELISTS-4795194
  • published26 Jul 2021
  • disclosed17 May 2018
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Introduced: 17 May 2018

CVE-2018-1120  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade RHEL:7 kernel-abi-whitelists to version 0:3.10.0-693.76.1.el7 or higher.
This issue was patched in RHSA-2020:3804.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-abi-whitelists package and not the kernel-abi-whitelists package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).