CVE-2021-3696
Severity
4.5MEDIUM
EPSS
0.1%
top 70.10%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 6
Latest updateSep 8
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:LExploitability: 1.0 | Impact: 3.4
Affected Packages9 packages
Also affects: Enterprise Linux 8.0, 8.1, 8.4, 9.0, 8.2, 8.6, Openshift Container Platform 4.10, 4.6, 4.9
🔴Vulnerability Details
4GHSA▶
GHSA-mv5h-82v3-mq2x: A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader↗2022-07-07
CVEList▶
CVE-2021-3696: A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader↗2022-07-06
OSV▶
CVE-2021-3696: A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader↗2022-07-06
📋Vendor Advisories
4Microsoft▶
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 ↗2022-07-12
Red Hat
▶
Debian▶
CVE-2021-3696: grub2 - A heap out-of-bounds write may heppen during the handling of Huffman tables in t...↗2021