Id:
CVE-2021-3696
Comment
:
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
CVSSv2 Score:
6.9
Access vector:
|
LOCAL
|
Access complexity:
|
MEDIUM
|
Authentication:
|
NONE
|
Confidentiality impact:
|
COMPLETE
|
Integrity impact:
|
COMPLETE
|
Availability impact:
|
COMPLETE
|
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
4.5
Attack vector:
|
LOCAL
|
Attack complexity:
|
HIGH
|
Privileges required:
|
LOW
|
User interaction:
|
NONE
|
Scope:
|
UNCHANGED
|
Confidentiality impact:
|
LOW
|
Integrity impact:
|
LOW
|
Availability impact:
|
LOW
|
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
References: