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

CVE-2021-44224

Disclosure Date: December 20, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).

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CVSS V3 Severity and Metrics
Base Score:
8.2 High
Impact Score:
4.2
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
High

General Information

Vendors

  • apache,
  • apple,
  • debian,
  • fedoraproject,
  • oracle,
  • tenable

Products

  • communications element manager,
  • communications operations monitor 4.0,
  • communications operations monitor 4.3,
  • communications operations monitor 4.4,
  • communications operations monitor 5.0,
  • communications session report manager,
  • communications session route manager,
  • debian linux 10.0,
  • debian linux 11.0,
  • fedora 34,
  • fedora 35,
  • fedora 36,
  • http server,
  • http server -,
  • http server 12.2.1.3.0,
  • http server 12.2.1.4.0,
  • instantis enterprisetrack 17.1,
  • instantis enterprisetrack 17.2,
  • instantis enterprisetrack 17.3,
  • mac os x 10.15.7,
  • macos,
  • tenable.sc

References

Advisory

Additional Info

Technical Analysis