Out-of-bounds Write Affecting grub2-efi-ia32-cdboot package, versions <1:2.02-0.87.0.7.el7
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Test your applications- Snyk ID SNYK-ORACLE7-GRUB2EFIIA32CDBOOT-2580887
- published 10 Apr 2022
- disclosed 3 Mar 2021
Introduced: 3 Mar 2021
CVE-2021-20233 Open this link in a new tabHow to fix?
Upgrade Oracle:7 grub2-efi-ia32-cdboot to version 1:2.02-0.87.0.7.el7 or higher.
This issue was patched in ELSA-2021-9076.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2-efi-ia32-cdboot package and not the grub2-efi-ia32-cdboot package as distributed by Oracle.
See How to fix? for Oracle:7 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://linux.oracle.com/cve/CVE-2021-20233.html
- https://linux.oracle.com/errata/ELSA-2021-0696.html
- https://linux.oracle.com/errata/ELSA-2021-0699.html
- https://linux.oracle.com/errata/ELSA-2021-9076.html
- https://linux.oracle.com/errata/ELSA-2021-9077.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1926263
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
- https://security.gentoo.org/glsa/202104-05
- https://security.netapp.com/advisory/ntap-20220325-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/