Out-of-bounds Write Affecting shim-ia32 package, versions <0:15.6-1.el8


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-ROCKY8-SHIMIA32-3198139
  • published5 Jan 2023
  • disclosed6 Jul 2022

Introduced: 6 Jul 2022

CVE-2021-3697  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 shim-ia32 to version 0:15.6-1.el8 or higher.
This issue was patched in RLSA-2022:5095.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-ia32 package and not the shim-ia32 package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

CVSS Base Scores

version 3.1