Integer Overflow or Wraparound Affecting shim-x64 package, versions <0:15-14.el8_2


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-SHIMX64-1433227
  • published26 Jul 2021
  • disclosed29 Jul 2020

Introduced: 29 Jul 2020

CVE-2020-14311  (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_2 or higher.
This issue was patched in RHSA-2020:3216.

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 is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

CVSS Scores

version 3.1