Integer Overflow or Wraparound Affecting shim-x64 package, versions <0:15-14.el8_0


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-RHEL8-SHIMX64-4380540
  • published26 Jul 2021
  • disclosed29 Jul 2020

Introduced: 29 Jul 2020

CVE-2020-14309  (opens in a new tab)
CWE-190  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade RHEL:8 shim-x64 to version 0:15-14.el8_0 or higher.
This issue was patched in RHSA-2020:3227.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-x64 package and not the shim-x64 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.

CVSS Scores

version 3.1