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

CVE-2021-3672

Disclosure Date: November 23, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
5.6 Medium
Impact Score:
3.4
Exploitability Score:
2.2
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
Low
Availability (A):
Low

General Information

Vendors

  • c-ares project,
  • fedoraproject,
  • nodejs,
  • pgbouncer,
  • redhat,
  • siemens

Products

  • c-ares,
  • enterprise linux 7.0,
  • enterprise linux 7.7,
  • enterprise linux 8.0,
  • enterprise linux computer node 1,
  • enterprise linux eus 7.7,
  • enterprise linux eus 8.1,
  • enterprise linux eus 8.2,
  • enterprise linux eus 8.4,
  • enterprise linux for ibm z systems 8.0,
  • enterprise linux for ibm z systems eus 8.1,
  • enterprise linux for ibm z systems eus 8.2,
  • enterprise linux for ibm z systems eus 8.4,
  • enterprise linux for power little endian 8.0,
  • enterprise linux for power little endian eus 8.1,
  • enterprise linux for power little endian eus 8.2,
  • enterprise linux for power little endian eus 8.4,
  • enterprise linux server aus 8.2,
  • enterprise linux server aus 8.4,
  • enterprise linux server tus 8.2,
  • enterprise linux server tus 8.4,
  • enterprise linux server update services for sap solutions 8.1,
  • enterprise linux server update services for sap solutions 8.2,
  • enterprise linux server update services for sap solutions 8.4,
  • enterprise linux tus 8.4,
  • enterprise linux workstation 1,
  • fedora 33,
  • fedora 34,
  • node.js,
  • pgbouncer,
  • sinec infrastructure network services

Additional Info

Technical Analysis