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Use After Free Affecting shim-ia32 package, versions <0:15-14.el8_2

Severity

 Recommended
0.0
medium
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.24% (62nd percentile)

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  • Snyk ID SNYK-CENTOS8-SHIMIA32-2045290
  • published 26 Jul 2021
  • disclosed 29 Jul 2020
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Introduced: 29 Jul 2020

CVE-2020-15706 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Centos:8 shim-ia32 to version 0:15-14.el8_2 or higher.

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 Centos. See How to fix? for Centos:8 relevant fixed versions and status.

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

References

CVSS Scores

version 3.1
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NVD

6.4 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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Red Hat

6.4 medium
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SUSE

6.4 medium