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7.5
CVSSv3

CVE-2022-41556

Published: 06/10/2022 Updated: 07/11/2023
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 0
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Vulnerability Summary

A resource leak in gw_backend.c in lighttpd 1.4.56 up to and including 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.

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Vendor Advisories

Debian Security Advisories: DSA-5243-1 lighttpd -- security update
Several vulnerabilities were discovered in lighttpd, a fast webserver with minimal memory footprint CVE-2022-37797 An invalid HTTP request (websocket handshake) may cause a NULL pointer dereference in the wstunnel module CVE-2022-41556 A resource leak in mod_fastcgi and mod_scgi could lead to a denial of service after a large num ...
Arch Linux Issues:
Severity Unknown Remote Unknown Type Unknown Description AVG-2822 lighttpd 1466-1 1467-1 Unknown Fixed githubcom/lighttpd/lighttpd14/pull/115 githubcom/lighttpd/lighttpd14/commit/bcddb ...

ICS Advisories

https://ics-cert.us-cert.gov/advisories/0600b443ff4393d097c485fbc8d3ed3b
Critical Infrastructure Sectors: Critical Manufacturing

References

CWE-401https://github.com/lighttpd/lighttpd1.4/pull/115https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67https://security.gentoo.org/glsa/202210-12https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/https://nvd.nist.govhttps://www.debian.org/security/2022/dsa-5243https://www.cisa.gov/news-events/ics-advisories/icsa-24-046-11
CVSSv3
CVSSv2
CVSSv3
VMScore
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