Use After Free Affecting shim-aa64 package, versions <0:15.6-1.el8
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Test your applications- Snyk ID SNYK-RHEL8-SHIMAA64-4285415
- published 9 Jun 2022
- disclosed 7 Jun 2022
Introduced: 7 Jun 2022
CVE-2022-28736 Open this link in a new tabHow to fix?
Upgrade RHEL:8 shim-aa64 to version 0:15.6-1.el8 or higher.
This issue was patched in RHSA-2022:5095.
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.
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.