Out-of-bounds Write Affecting shim-aa64 package, versions <0:15.4-2.el8_1
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-RHEL8-SHIMAA64-4054180
- published 26 Jul 2021
- disclosed 2 Mar 2021
Introduced: 2 Mar 2021
CVE-2021-20233 Open this link in a new tabHow to fix?
Upgrade RHEL:8 shim-aa64 to version 0:15.4-2.el8_1 or higher.
This issue was patched in RHSA-2021:1734.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shim-aa64 package and not the shim-aa64 package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References
- https://access.redhat.com/security/cve/CVE-2021-20233
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
- https://security.gentoo.org/glsa/202104-05
- https://bugzilla.redhat.com/show_bug.cgi?id=1926263
- https://access.redhat.com/errata/RHSA-2021:1734
- https://security.netapp.com/advisory/ntap-20220325-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/