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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: redhat
Published: 2022-07-06T15:06:38
Updated: 2024-08-03T17:01:08.290Z
Reserved: 2021-08-10T00:00:00
Link: CVE-2021-3695
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-07-06T16:15:08.210
Modified: 2024-11-21T06:22:10.483
Link: CVE-2021-3695
Redhat