CVE-2021-3697

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.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory gentoo.org
Affected: n/a grub2
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1991687 issue tracking third party advisory
https://security.gentoo.org/glsa/202209-12 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20220930-0001/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-3697?
CVE-2021-3697 has been scored as a high severity vulnerability.
How to fix CVE-2021-3697?
To fix CVE-2021-3697, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3697 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3697 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3697?
CVE-2021-3697 affects n/a grub2.
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