CVE-2021-3697CWE-787

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap

published July 6, 2022

CVSS
—
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00458 · 38.7th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2022-07-06T15:06Z
EPSS history
Timeline
  • 06 JUL 15:06Z
    A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap
    cvelistv5