Use After Free 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-2581037
- published 10 Apr 2022
- disclosed 3 Mar 2021
Introduced: 3 Mar 2021
CVE-2020-25632 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. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References
- https://linux.oracle.com/cve/CVE-2020-25632.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=1879577
- 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/