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Integer Overflow or Wraparound 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
    0.13% (49th percentile)

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  • Snyk ID SNYK-CENTOS8-SHIMIA32-2042900
  • published 26 Jul 2021
  • disclosed 29 Jul 2020
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Introduced: 29 Jul 2020

CVE-2020-15707 Open this link in a new tab
CWE-190 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.

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. 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

5.7 medium
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SUSE

6.4 medium