CVE-2021-44224
high-risk
Published 2021-12-20
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).
Do I need to act?
!
11.0% chance of exploitation in next 30 days
EPSS score — higher than 89% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.2/10
High
NETWORK
/ LOW complexity
Affected Products (20)
References (38)
Vendor Advisory
http://httpd.apache.org/security/vulnerabilities_24.html
Mailing List
http://seclists.org/fulldisclosure/2022/May/33
Mailing List
http://seclists.org/fulldisclosure/2022/May/35
Mailing List
http://seclists.org/fulldisclosure/2022/May/38
Third Party Advisory
https://security.gentoo.org/glsa/202208-20
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211224-0001/
Third Party Advisory
https://support.apple.com/kb/HT213255
Third Party Advisory
https://support.apple.com/kb/HT213256
Third Party Advisory
https://support.apple.com/kb/HT213257
Third Party Advisory
https://www.debian.org/security/2022/dsa-5035
Third Party Advisory
https://www.tenable.com/security/tns-2022-01
Third Party Advisory
https://www.tenable.com/security/tns-2022-03
Vendor Advisory
http://httpd.apache.org/security/vulnerabilities_24.html
and 18 more references
62
/ 100
high-risk
Severity
28/34 · Critical
Exploitability
11/34 · Low
Exposure
23/34 · High