CVE-2022-41556

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 62%
VendorProductVersion
lighttpdlighttpd
1.4.56 ≤
𝑥
< 1.4.67
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
lighttpd
bullseye (security)
1.4.59-1+deb11u2
fixed
bullseye
1.4.59-1+deb11u2
fixed
buster
not-affected
bookworm
1.4.69-1
fixed
sid
1.4.76-1
fixed
trixie
1.4.76-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
lighttpd
noble
not-affected
mantic
not-affected
lunar
ignored
kinetic
Fixed 1.4.65-2ubuntu1.1
released
jammy
Fixed 1.4.63-1ubuntu3.1
released
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
needs-triage
Common Weakness Enumeration
References
https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50
https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67
https://github.com/lighttpd/lighttpd1.4/pull/115
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/
https://security.gentoo.org/glsa/202210-12
https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50
https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67
https://github.com/lighttpd/lighttpd1.4/pull/115
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/
https://security.gentoo.org/glsa/202210-12