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A vulnerability in Lighttpd versions 1.4.56 through 1.4.58 allows remote attackers to cause a denial of service by sending requests with large headers. Due to a typo in the connection_read_header_more function in connections.c, the server mishandles multiple read operations on large headers, resulting in stuck connections and excessive CPU consumption.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a working exploit for CVE-2022-30780, a denial-of-service vulnerability in the lighttpd web server (versions 1.4.56, 1.4.57, 1.4.58). The main exploit script, 'CVE-2022-30780-lighttpd-denial-of-service.py', is a Python 3 tool that performs a DoS attack by sending a large number of HTTP requests with excessively long URLs to the target server, causing it to become unresponsive. The script includes logic to determine the maximum URL length the server can handle and then launches a multi-threaded attack to exhaust server resources. The repository also contains a comprehensive test environment under the 'tests/' directory, with Dockerfiles and Makefiles for various lighttpd versions, allowing users to set up vulnerable instances for testing. Additional scripts, such as 'generate_tests.py', automate the setup and testing process. The exploit is unauthenticated and targets network-accessible lighttpd servers. No fake or destructive code is present beyond the intended DoS functionality.
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