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CVE-2021-3696

Published: Jul 6, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-787
4.5MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 61.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:LI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

redhat
commercial·USaka red hat
developer toolsOn-prem
Operating Systems / linux-distro
openshiftOn-prem
Operating Systems / linux-distro
enterprise linux server ausOn-premOS
Operating Systems / linux-distro
enterprise linux for power little endianOn-prem
Operating Systems / linux-distro
enterprise linux for power little endian eusOn-prem
Operating Systems / linux-distro
enterprise linux server for power little endian update services for sap solutionsOn-prem
Operating Systems / linux-distro
openshift container platformOn-prem
Operating Systems / linux-distro
codeready linux builderOn-prem
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «НППКТ»
commercial·RU
ОСОН ОСнова ОnyxOn-premOS
Operating Systems / linux-distro
Erich Boleyn
individual-devaka grub
Grub2On-prem
Operating Systems
and 8 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://bugzilla.redhat.com/show_bug.cgi?id=1991686
bugzilla.redhat.com
https://security.gentoo.org/glsa/202209-12
security.gentoo.org
https://security.netapp.com/advisory/ntap-20220930-0001/
security.netapp.com
and 9 more references View all →

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