Use After Free Affecting grub2-efi-ia32-cdboot package, versions <1:2.02-0.87.0.21.el7_9.9
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Test your applications- Snyk ID SNYK-ORACLE7-GRUB2EFIIA32CDBOOT-2862557
- published 8 Jun 2022
- disclosed 20 Jul 2023
Introduced: 8 Jun 2022
CVE-2022-28736 Open this link in a new tabHow to fix?
Upgrade Oracle:7 grub2-efi-ia32-cdboot to version 1:2.02-0.87.0.21.el7_9.9 or higher.
This issue was patched in ELSA-2022-9469.
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.
There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.
References
- https://linux.oracle.com/cve/CVE-2022-28736.html
- https://linux.oracle.com/errata/ELSA-2022-5095.html
- https://linux.oracle.com/errata/ELSA-2022-9471.html
- https://linux.oracle.com/errata/ELSA-2022-9595.html
- https://linux.oracle.com/errata/ELSA-2022-9596.html
- https://linux.oracle.com/errata/ELSA-2023-12952.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
- https://www.openwall.com/lists/oss-security/2022/06/07/5
- https://security.netapp.com/advisory/ntap-20230825-0002/