Memory leak in the httprequestparse function in request.c in lighttpd before 1.4.20 allows remote attackers to cause a denial of service (memory consumption) via a large number of requests with duplicate request headers.

An signedness error, leading to out of stack-based buffer read flaw was found in the way lighttpd, a lightning fast webserver with light system requirements, processed certain invalid base64 HTTP authentication tokens. A remote attacker could provide a specially crafted HTTP authentication request, leading to denial of service (lighttpd daemon crash due to an signedness error while processing the token).

Upstream bug report: [1] http://redmine.lighttpd.net/issues/2370

Upstream patch (with testcase and NEWS update): [2] http://redmine.lighttpd.net/projects/lighttpd/repository/revisions/2806/diff

References: [3] http://download.lighttpd.net/lighttpd/security/lighttpdsa201101.txt (upstream advisory) [4] http://www.openwall.com/lists/oss-security/2011/11/29/8 (CVE request) [5] http://www.openwall.com/lists/oss-security/2011/11/29/13 (CVE assignment)