Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2021-3696

Disclosure Date: July 06, 2022 •
CVE-2021-3696 CVSS v3 Base Score: 4.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
4.5 Medium
Impact Score:
3.4
Exploitability Score:
1
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector (AV):
Local
Attack Complexity (AC):
High
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
Low
Availability (A):
Low

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
grub2 grub-2.06
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • gnu,
  • netapp,
  • redhat

Products

  • codeready linux builder -,
  • developer tools 1.0,
  • enterprise linux 8.0,
  • enterprise linux 8.1,
  • enterprise linux 8.4,
  • enterprise linux 9.0,
  • enterprise linux eus 8.2,
  • enterprise linux eus 8.4,
  • enterprise linux eus 8.6,
  • enterprise linux eus 9.0,
  • enterprise linux for power little endian 8.0,
  • enterprise linux for power little endian 9.0,
  • enterprise linux for power little endian eus 8.2,
  • enterprise linux for power little endian eus 8.4,
  • enterprise linux for power little endian eus 8.6,
  • enterprise linux for power little endian eus 9.0,
  • enterprise linux server aus 8.2,
  • enterprise linux server aus 8.4,
  • enterprise linux server aus 8.6,
  • enterprise linux server for power little endian update services for sap solutions 8.1,
  • enterprise linux server for power little endian update services for sap solutions 8.2,
  • enterprise linux server for power little endian update services for sap solutions 8.4,
  • enterprise linux server for power little endian update services for sap solutions 8.6,
  • enterprise linux server for power little endian update services for sap solutions 9.0,
  • enterprise linux server tus 8.2,
  • enterprise linux server tus 8.4,
  • enterprise linux server tus 8.6,
  • grub2,
  • ontap select deploy administration utility -,
  • openshift 3.0,
  • openshift container platform 4.10,
  • openshift container platform 4.6,
  • openshift container platform 4.9

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis