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CVE-2014-0075 is an integer-overflow vulnerability in Apache Tomcat's HTTP/1.1 chunked-transfer input handling, specifically the parseChunkHeader function in the Coyote ChunkedInputFilter. Tomcat versions before 6.0.40, 7.0.53, and 8.0.4 fail to safely handle malformed or excessively sized chunk-size values while streaming a chunked HTTP request. The flawed parsing permits an attacker to cause unbounded request streaming and excessive server resource consumption.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
Repository contains a single Python proof-of-concept exploit (CVE-2014-0075.py) plus LICENSE and a short README. The script is a network DoS PoC that opens many concurrent HTTP(S) connections and sends POST requests with 'Transfer-Encoding: chunked'. Inside an infinite loop it continuously streams large chunk bodies (default 5 MiB buffer reused) while sending an intentionally oversized/invalid chunk-size line (a very large numeric string) intended to trigger an integer overflow in vulnerable chunked-encoding parsing/handling (CVE-2014-0075). It schedules new threads every INTERVAL_SEC (default 3s) up to MAX_CONCURRENCY (default 300), keeping connections alive and continuously sending data to maximize resource exhaustion and potential crash/hang. Default target is 127.0.0.1 with PATH='/' and port 8081 for HTTP or 443 for HTTPS; these are configurable via constants at the top of the script.
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A network-accessible Apache Tomcat denial-of-service vulnerability caused by an integer overflow in parseChunkHeader. A remote unauthenticated attacker can send a malformed chunk size in a chunked HTTP request to exhaust available resources.
An integer-overflow denial-of-service vulnerability in Apache Tomcat's HTTP/1.1 ChunkedInputFilter chunk-header parsing. A remote attacker can submit a malformed chunk size in a chunked HTTP request, causing resource consumption during streamed request processing.
Limited denial-of-service flaw in the Tomcat/JBossWeb ChunkedInputFilter.
A limited denial-of-service vulnerability in the Tomcat/JBossWeb chunked-transfer-encoding input filter.
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