{"id":"ALPINE-CVE-2022-41556","details":"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.","modified":"2025-12-03T22:52:04.639272Z","published":"2022-10-06T18:17:03.620Z","upstream":["CVE-2022-41556"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2022-41556"}],"affected":[{"package":{"name":"lighttpd","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/lighttpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.67-r0"}]}],"versions":["1.4.20-r1","1.4.20-r2","1.4.22-r0","1.4.23-r0","1.4.23-r1","1.4.23-r2","1.4.24-r0","1.4.25-r0","1.4.25-r1","1.4.25-r2","1.4.26-r0","1.4.26-r1","1.4.26-r2","1.4.26-r3","1.4.26-r4","1.4.26-r5","1.4.27-r0","1.4.28-r0","1.4.28-r3","1.4.28-r4","1.4.28-r5","1.4.28-r6","1.4.28-r7","1.4.29-r0","1.4.29-r1","1.4.29-r2","1.4.30-r0","1.4.30-r1","1.4.30-r2","1.4.30-r3","1.4.31-r0","1.4.32-r0","1.4.32-r1","1.4.33-r1","1.4.33-r2","1.4.33-r3","1.4.34-r0","1.4.34-r1","1.4.35-r0","1.4.35-r1","1.4.35-r2","1.4.35-r3","1.4.35-r4","1.4.36-r0","1.4.37-r0","1.4.38-r0","1.4.39-r0","1.4.39-r1","1.4.39-r2","1.4.39-r3","1.4.39-r4","1.4.40-r0","1.4.40-r1","1.4.42-r0","1.4.43-r0","1.4.44-r0","1.4.45-r0","1.4.45-r1","1.4.47-r0","1.4.47-r1","1.4.48-r0","1.4.48-r1","1.4.49-r0","1.4.49-r1","1.4.50-r0","1.4.50-r1","1.4.52-r0","1.4.53-r0","1.4.53-r1","1.4.54-r0","1.4.54-r1","1.4.55-r0","1.4.55-r1","1.4.56-r0","1.4.57-r0","1.4.59-r0","1.4.59-r1","1.4.59-r2","1.4.60-r0","1.4.61-r0","1.4.61-r1","1.4.64-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-41556.json"}},{"package":{"name":"lighttpd","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/lighttpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.67-r0"}]}],"versions":["1.4.20-r1","1.4.20-r2","1.4.22-r0","1.4.23-r0","1.4.23-r1","1.4.23-r2","1.4.24-r0","1.4.25-r0","1.4.25-r1","1.4.25-r2","1.4.26-r0","1.4.26-r1","1.4.26-r2","1.4.26-r3","1.4.26-r4","1.4.26-r5","1.4.27-r0","1.4.28-r0","1.4.28-r3","1.4.28-r4","1.4.28-r5","1.4.28-r6","1.4.28-r7","1.4.29-r0","1.4.29-r1","1.4.29-r2","1.4.30-r0","1.4.30-r1","1.4.30-r2","1.4.30-r3","1.4.31-r0","1.4.32-r0","1.4.32-r1","1.4.33-r1","1.4.33-r2","1.4.33-r3","1.4.34-r0","1.4.34-r1","1.4.35-r0","1.4.35-r1","1.4.35-r2","1.4.35-r3","1.4.35-r4","1.4.36-r0","1.4.37-r0","1.4.38-r0","1.4.39-r0","1.4.39-r1","1.4.39-r2","1.4.39-r3","1.4.39-r4","1.4.40-r0","1.4.40-r1","1.4.42-r0","1.4.43-r0","1.4.44-r0","1.4.45-r0","1.4.45-r1","1.4.47-r0","1.4.47-r1","1.4.48-r0","1.4.48-r1","1.4.49-r0","1.4.49-r1","1.4.50-r0","1.4.50-r1","1.4.52-r0","1.4.53-r0","1.4.53-r1","1.4.54-r0","1.4.54-r1","1.4.55-r0","1.4.55-r1","1.4.56-r0","1.4.57-r0","1.4.59-r0","1.4.59-r1","1.4.59-r2","1.4.60-r0","1.4.61-r0","1.4.61-r1","1.4.62-r0","1.4.63-r0","1.4.64-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-41556.json"}},{"package":{"name":"lighttpd","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/lighttpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.67-r0"}]}],"versions":["1.4.20-r1","1.4.20-r2","1.4.22-r0","1.4.23-r0","1.4.23-r1","1.4.23-r2","1.4.24-r0","1.4.25-r0","1.4.25-r1","1.4.25-r2","1.4.26-r0","1.4.26-r1","1.4.26-r2","1.4.26-r3","1.4.26-r4","1.4.26-r5","1.4.27-r0","1.4.28-r0","1.4.28-r3","1.4.28-r4","1.4.28-r5","1.4.28-r6","1.4.28-r7","1.4.29-r0","1.4.29-r1","1.4.29-r2","1.4.30-r0","1.4.30-r1","1.4.30-r2","1.4.30-r3","1.4.31-r0","1.4.32-r0","1.4.32-r1","1.4.33-r1","1.4.33-r2","1.4.33-r3","1.4.34-r0","1.4.34-r1","1.4.35-r0","1.4.35-r1","1.4.35-r2","1.4.35-r3","1.4.35-r4","1.4.36-r0","1.4.37-r0","1.4.38-r0","1.4.39-r0","1.4.39-r1","1.4.39-r2","1.4.39-r3","1.4.39-r4","1.4.40-r0","1.4.40-r1","1.4.42-r0","1.4.43-r0","1.4.44-r0","1.4.45-r0","1.4.45-r1","1.4.47-r0","1.4.47-r1","1.4.48-r0","1.4.48-r1","1.4.49-r0","1.4.49-r1","1.4.50-r0","1.4.50-r1","1.4.52-r0","1.4.53-r0","1.4.53-r1","1.4.54-r0","1.4.54-r1","1.4.55-r0","1.4.55-r1","1.4.56-r0","1.4.57-r0","1.4.59-r0","1.4.59-r1","1.4.59-r2","1.4.60-r0","1.4.61-r0","1.4.61-r1","1.4.62-r0","1.4.63-r0","1.4.64-r0","1.4.65-r0","1.4.65-r1","1.4.66-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2022-41556.json"}},{"package":{"name":"lighttpd","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/lighttpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.67-r0"}]}],"versions":["1.4.20-r1","1.4.20-r2","1.4.22-r0","1.4.23-r0","1.4.23-r1","1.4.23-r2","1.4.24-r0","1.4.25-r0","1.4.25-r1","1.4.25-r2","1.4.26-r0","1.4.26-r1","1.4.26-r2","1.4.26-r3","1.4.26-r4","1.4.26-r5","1.4.27-r0","1.4.28-r0","1.4.28-r3","1.4.28-r4","1.4.28-r5","1.4.28-r6","1.4.28-r7","1.4.29-r0","1.4.29-r1","1.4.29-r2","1.4.30-r0","1.4.30-r1","1.4.30-r2","1.4.30-r3","1.4.31-r0","1.4.32-r0","1.4.32-r1","1.4.33-r1","1.4.33-r2","1.4.33-r3","1.4.34-r0","1.4.34-r1","1.4.35-r0","1.4.35-r1","1.4.35-r2","1.4.35-r3","1.4.35-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