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Vulnerability Details : CVE-2021-3672

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.
Publish Date : 2021-11-23 Last Update Date : 2021-12-14
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
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) Cross Site Scripting
CWE ID 79

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:3623: nodejs:12 security and bug fix update (Important) oval:com.redhat.rhsa:def:20213623 unix
RHSA-2021:3666: nodejs:14 security and bug fix update (Important) oval:com.redhat.rhsa:def:20213666 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-2021-3672

# Product Type Vendor Product Version Update Edition Language
1 Application C-ares Project C-ares * * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
3 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux 7.0 * * * Version Details Vulnerabilities
5 OS Redhat Enterprise Linux 7.7 * * * Version Details Vulnerabilities
6 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux Computer Node 1 * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux Eus 7.7 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux Eus 8.1 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux Eus 8.2 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux Eus 8.4 * * * Version Details Vulnerabilities
12 OS Redhat Enterprise Linux For Ibm Z Systems 8.0 * * * Version Details Vulnerabilities
13 OS Redhat Enterprise Linux For Ibm Z Systems Eus 8.1 * * * Version Details Vulnerabilities
14 OS Redhat Enterprise Linux For Ibm Z Systems Eus 8.2 * * * Version Details Vulnerabilities
15 OS Redhat Enterprise Linux For Ibm Z Systems Eus 8.4 * * * Version Details Vulnerabilities
16 OS Redhat Enterprise Linux For Power Little Endian 8.0 * * * Version Details Vulnerabilities
17 OS Redhat Enterprise Linux For Power Little Endian Eus 8.1 * * * Version Details Vulnerabilities
18 OS Redhat Enterprise Linux For Power Little Endian Eus 8.2 * * * Version Details Vulnerabilities
19 OS Redhat Enterprise Linux For Power Little Endian Eus 8.4 * * * Version Details Vulnerabilities
20 OS Redhat Enterprise Linux Server Aus 8.2 * * * Version Details Vulnerabilities
21 OS Redhat Enterprise Linux Server Aus 8.4 * * * Version Details Vulnerabilities
22 OS Redhat Enterprise Linux Server Tus 8.2 * * * Version Details Vulnerabilities
23 OS Redhat Enterprise Linux Server Tus 8.4 * * * Version Details Vulnerabilities
24 OS Redhat Enterprise Linux Server Update Services For Sap Solutions 8.1 * * * Version Details Vulnerabilities
25 OS Redhat Enterprise Linux Server Update Services For Sap Solutions 8.2 * * * Version Details Vulnerabilities
26 OS Redhat Enterprise Linux Server Update Services For Sap Solutions 8.4 * * * Version Details Vulnerabilities
27 OS Redhat Enterprise Linux Tus 8.4 * * * Version Details Vulnerabilities
28 OS Redhat Enterprise Linux Workstation 1 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
C-ares Project C-ares 1
Fedoraproject Fedora 2
Redhat Enterprise Linux 3
Redhat Enterprise Linux Computer Node 1
Redhat Enterprise Linux Eus 4
Redhat Enterprise Linux For Ibm Z Systems 1
Redhat Enterprise Linux For Ibm Z Systems Eus 3
Redhat Enterprise Linux For Power Little Endian 1
Redhat Enterprise Linux For Power Little Endian Eus 3
Redhat Enterprise Linux Server Aus 2
Redhat Enterprise Linux Server Tus 2
Redhat Enterprise Linux Server Update Services For Sap Solutions 3
Redhat Enterprise Linux Tus 1
Redhat Enterprise Linux Workstation 1

- References For CVE-2021-3672

https://c-ares.haxx.se/adv_20210810.html
https://bugzilla.redhat.com/show_bug.cgi?id=1988342

- Metasploit Modules Related To CVE-2021-3672

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


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