CVE-2021-3697
High
Description
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
SeverityHigh
CVSS7.0
Exploit probability—
Product
Gnu Grub2
PublishedJul 6, 2022
First seenJul 6, 2022
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- gnu grub22.12 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu grub2 | 2.00 ≤ v < 2.12 | 2.12 |
| redhat developer_tools | 1.0 | — |
| redhat openshift | 3.0 | — |
| redhat enterprise_linux | 8.0, 8.1, 8.4, 9.0 | — |
| redhat enterprise_linux_eus | 8.2, 8.4, 8.6, 9.0 | — |
| redhat enterprise_linux_for_power_little_endian | 8.0, 9.0 | — |
| redhat enterprise_linux_for_power_little_endian_eus | 8.2, 8.4, 8.6, 9.0 | — |
| redhat enterprise_linux_server_aus | 8.2, 8.4, 8.6 | — |
| redhat enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.1, 8.2, 8.4, 8.6, 9.0 | — |
| redhat enterprise_linux_server_tus | 8.2, 8.4, 8.6 | — |
| redhat openshift_container_platform | 4.6, 4.9, 4.10 | — |
| redhat codeready_linux_builder | No range specified | — |
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