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cvelistApacheCVELIST:CVE-2021-44224
HistoryDec 20, 2021 - 11:20 a.m.

CVE-2021-44224 Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier

2021-12-2011:20:13
CWE-476
apache
www.cve.org

9.2 High

AI Score

Confidence

High

0.307 Low

EPSS

Percentile

97.0%

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).

CNA Affected

[
  {
    "product": "Apache HTTP Server",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "Apache HTTP Server 2.4*",
        "status": "affected",
        "version": "2.4.7",
        "versionType": "custom"
      }
    ]
  }
]

References