Vulnerability CVE-2021-3672


Published: 2021-11-23

Description:
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.

Type:

CWE-79

(Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Enterprise linux 
Redhat -> Enterprise linux computer node 
Redhat -> Enterprise linux eus 
Redhat -> Enterprise linux for ibm z systems 
Redhat -> Enterprise linux for ibm z systems eus 
Redhat -> Enterprise linux for power little endian 
Redhat -> Enterprise linux for power little endian eus 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux server update services for sap solutions 
Redhat -> Enterprise linux tus 
Redhat -> Enterprise linux workstation 
Fedoraproject -> Fedora 
C-ares project -> C-ares 

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

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