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The http_request_split_value function in request.c in lighttpd before 1.4.32 allows remote attackers to cause a denial of service (infinite loop) via a request with a header containing an empty token, as demonstrated using the "Connection: TE,,Keep-Alive" header.
Use CWE-399, Lighttpd vendor hub and Lighttpd product page to widen CVE-2012-5533 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2019-11072, CVE-2014-2323 and CVE-2013-4559 for nearby disclosures in the same product family.