The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."

Threat-Mapped Scoring

Score: 0.0

Priority: Unclassified

EPSS

Score: 0.81401
Percentile: 0.99111

CVSS Scoring

Mapped CWE(s)

• CWE-444 : Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

Affected Products

• cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*

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