Out-of-bounds Write Affecting shim-ia32 package, versions <0:15.6-1.el8
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Test your applications- Snyk ID SNYK-CENTOS8-SHIMIA32-2931267
- published 9 Jun 2022
- disclosed 7 Jun 2022
Introduced: 7 Jun 2022
CVE-2021-3695 Open this link in a new tabHow to fix?
Upgrade Centos:8 shim-ia32 to version 0:15.6-1.el8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shim-ia32 package and not the shim-ia32 package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.