Vulnerability CVE-2021-3697


Published: 2022-07-06

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.

Type:

CWE-787

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.4/10
6.4/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Openshift 
Redhat -> Enterprise linux 
Redhat -> Developer tools 
Redhat -> Enterprise linux eus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux for power little endian 
Redhat -> Enterprise linux for power little endian eus 
Redhat -> Enterprise linux server for power little endian update services for sap solutions 
GNU -> GRUB 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1991687

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