Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 62.7%
CVSS Severity
CVSS v3 Score 7.5
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
Products affected by CVE-2022-41556
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cpe:2.3:a:lighttpd:lighttpd:1.4.56
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cpe:2.3:a:lighttpd:lighttpd:1.4.57
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cpe:2.3:a:lighttpd:lighttpd:1.4.58
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cpe:2.3:a:lighttpd:lighttpd:1.4.59
-
cpe:2.3:a:lighttpd:lighttpd:1.4.60
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cpe:2.3:a:lighttpd:lighttpd:1.4.61
-
cpe:2.3:a:lighttpd:lighttpd:1.4.62
-
cpe:2.3:a:lighttpd:lighttpd:1.4.63
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cpe:2.3:a:lighttpd:lighttpd:1.4.64
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cpe:2.3:a:lighttpd:lighttpd:1.4.65
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cpe:2.3:a:lighttpd:lighttpd:1.4.66
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cpe:2.3:o:fedoraproject:fedora:35