CVE-2021-3697

moderate-risk
Published 2022-07-06

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.

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10 High
LOCAL / HIGH complexity

Affected Products (20)

Developer Tools

Affected Vendors

Redhat Gnu

References (6)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1991687
Third Party Advisory https://security.gentoo.org/glsa/202209-12
Third Party Advisory https://security.netapp.com/advisory/ntap-20220930-0001/
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1991687
Third Party Advisory https://security.gentoo.org/glsa/202209-12
Third Party Advisory https://security.netapp.com/advisory/ntap-20220930-0001/
41
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 23/34 · High