Name | CVE-2022-41556 |
Description | A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
References | DSA-5243-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
lighttpd (PTS) | buster | 1.4.53-4+deb10u2 | fixed |
buster (security) | 1.4.53-4+deb10u3 | fixed | |
bullseye (security), bullseye | 1.4.59-1+deb11u2 | fixed | |
bookworm, sid | 1.4.69-1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
lighttpd | source | buster | (not affected) | |||
lighttpd | source | bullseye | 1.4.59-1+deb11u2 | DSA-5243-1 | ||
lighttpd | source | (unstable) | 1.4.67-1 |
[buster] - lighttpd <not-affected> (vulnerable code inserted in lighttpd-1.4.55-211-gbcddbe18)
https://github.com/lighttpd/lighttpd1.4/pull/115
Introduced by: https://github.com/lighttpd/lighttpd1.4/commit/bcddbe186f010e2964f7551141c0b8350b36817d (lighttpd-1.4.56-rc1)
Fixed by: https://github.com/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50 (lighttpd-1.4.67)