HTTP: Apache httpd mod proxy NULL Pointer Dereference
This signature detects attempts to exploit a known vulnerability against Apache httpd mod proxy. A successful attack can result in a denial-of-service condition.
Extended 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).
Affected Products
Apple mac_os_x
References
CVE: CVE-2021-44224
URL: https://httpd.apache.org/security/vulnerabilities_24.html#2.4.52
Short Name
HTTP:DOS:APCHE-HTTPD-MDPRXY-DOS
Severity
Minor
Recommended
True
Recommended Action
Drop
Category
HTTP
Keywords
Apache CVE-2021-44224 Dereference NULL Pointer httpd mod proxy
Release Date
01/20/2022
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3793
False Positive
Unknown
Vendors
Apple
Fedoraproject
Oracle
Apache
Debian
Tenable
CVSS Score
6.4