CVE-2019-11072

Name	CVE-2019-11072
Description	lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishandling of /%2F? in burl_normalize_2F_to_slash_fix in burl.c. NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e.g. lighttpd.conf). Certain input will trigger an abort() in lighttpd when that feature is enabled. lighttpd detects the underflow or realloc() will fail (in both 32-bit and 64-bit executables), also detected in lighttpd. Either triggers an explicit abort() by lighttpd. This is not exploitable beyond triggering the explicit abort() with subsequent application exit.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	926885

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
lighttpd (PTS)	jessie, jessie (lts)	1.4.35-4+deb8u1	fixed
	stretch (security), stretch (lts), stretch	1.4.45-1+deb9u1	fixed
	buster (security), buster, buster (lts)	1.4.53-4+deb10u3	fixed
	bullseye (security), bullseye	1.4.59-1+deb11u2	fixed
	bookworm	1.4.69-1	fixed
	sid, trixie	1.4.76-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Debian Bugs
lighttpd	source	wheezy	(unfixed)	end-of-life
lighttpd	source	jessie	(not affected)
lighttpd	source	stretch	(not affected)
lighttpd	source	(unstable)	1.4.53-4		926885

Notes

[stretch] - lighttpd <not-affected> (Vulnerable code introduced later)
[jessie] - lighttpd <not-affected> (Vulnerable code introduced later)
https://redmine.lighttpd.net/issues/2945
Fixed by: https://github.com/lighttpd/lighttpd1.4/commit/32120d5b8b3203fc21ccb9eafb0eaf824bb59354
Introduced with: https://github.com/lighttpd/lighttpd1.4/commit/3eb7902e10ba75b3f2eb159e244d0d8e5037ccd2