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Vulnerability Details : CVE-2021-3697

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.
Publish Date : 2022-07-06 Last Update Date : 2022-09-30
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- CVSS Scores & Vulnerability Types

CVSS Score
4.4
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 787

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2022:5095: grub2, mokutil, shim, and shim-unsigned-x64 security update (Important) oval:com.redhat.rhsa:def:20225095 unix
RHSA-2022:5099: grub2, mokutil, shim, and shim-unsigned-x64 security update (Important) oval:com.redhat.rhsa:def:20225099 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-3697

# Product Type Vendor Product Version Update Edition Language
1 Application GNU Grub * * * * Version Details Vulnerabilities
2 Application Redhat Developer Tools 1.0 * * * Version Details Vulnerabilities
3 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux 8.1 * * * Version Details Vulnerabilities
5 OS Redhat Enterprise Linux 8.4 * * * Version Details Vulnerabilities
6 OS Redhat Enterprise Linux 9.0 * * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux Eus 8.2 * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux Eus 8.4 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux Eus 8.6 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux Eus 9.0 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux For Power Little Endian 8.0 * * * Version Details Vulnerabilities
12 OS Redhat Enterprise Linux For Power Little Endian 9.0 * * * Version Details Vulnerabilities
13 OS Redhat Enterprise Linux For Power Little Endian Eus 8.2 * * * Version Details Vulnerabilities
14 OS Redhat Enterprise Linux For Power Little Endian Eus 8.4 * * * Version Details Vulnerabilities
15 OS Redhat Enterprise Linux For Power Little Endian Eus 8.6 * * * Version Details Vulnerabilities
16 OS Redhat Enterprise Linux For Power Little Endian Eus 9.0 * * * Version Details Vulnerabilities
17 OS Redhat Enterprise Linux Server Aus 8.2 * * * Version Details Vulnerabilities
18 OS Redhat Enterprise Linux Server Aus 8.4 * * * Version Details Vulnerabilities
19 OS Redhat Enterprise Linux Server Aus 8.6 * * * Version Details Vulnerabilities
20 OS Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 8.1 * * * Version Details Vulnerabilities
21 OS Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 8.2 * * * Version Details Vulnerabilities
22 OS Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 8.4 * * * Version Details Vulnerabilities
23 OS Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 8.6 * * * Version Details Vulnerabilities
24 OS Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 9.0 * * * Version Details Vulnerabilities
25 OS Redhat Enterprise Linux Server Tus 8.2 * * * Version Details Vulnerabilities
26 OS Redhat Enterprise Linux Server Tus 8.4 * * * Version Details Vulnerabilities
27 OS Redhat Enterprise Linux Server Tus 8.6 * * * Version Details Vulnerabilities
28 Application Redhat Openshift 3.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
GNU Grub 1
Redhat Developer Tools 1
Redhat Enterprise Linux 4
Redhat Enterprise Linux Eus 4
Redhat Enterprise Linux For Power Little Endian 2
Redhat Enterprise Linux For Power Little Endian Eus 4
Redhat Enterprise Linux Server Aus 3
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions 5
Redhat Enterprise Linux Server Tus 3
Redhat Openshift 1

- References For CVE-2021-3697

https://security.netapp.com/advisory/ntap-20220930-0001/ CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=1991687
https://security.gentoo.org/glsa/202209-12
GENTOO GLSA-202209-12

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2021-3697

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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