{"id":"ALPINE-CVE-2021-31806","details":"An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.","modified":"2025-12-03T22:48:37.402045Z","published":"2021-05-27T13:15:08.270Z","upstream":["CVE-2021-31806"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-31806"}],"affected":[{"package":{"name":"squid","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/squid?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15-r0"}]}],"versions":["2.7.6-r0","2.7.6-r1","2.7.6-r10","2.7.6-r11","2.7.6-r12","2.7.6-r2","2.7.6-r3","2.7.6-r4","2.7.6-r5","2.7.6-r6","2.7.6-r7","2.7.6-r8","2.7.6-r9","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.7-r5","2.7.9-r0","2.7.9-r1","2.7.9-r2","2.7.9-r3","2.7.9-r4","3.2.0.12-r1","3.2.0.12-r2","3.2.0.12-r3","3.2.0.12-r4","3.2.0.13-r0","3.2.0.16-r0","3.2.0.17-r0","3.2.0.17-r1","3.2.0.17-r2","3.2.0.18-r0","3.2.0.18-r1","3.2.0.19-r0","3.2.0.19-r1","3.2.2-r0","3.2.3-r0","3.2.4-r0","3.2.5-r0","3.2.6-r0","3.2.6-r1","3.2.7-r1","3.2.7-r2","3.3.10-r0","3.3.11-r0","3.3.11-r1","3.3.2-r0","3.3.3-r0","3.3.4-r0","3.3.5-r0","3.3.6-r0","3.3.7-r0","3.3.8-r0","3.3.8-r1","3.3.9-r0","3.4.10-r0","3.4.11-r0","3.4.12-r0","3.4.5-r0","3.4.6-r0","3.4.6-r1","3.4.7-r0","3.4.8-r0","3.4.9-r0","3.5.10-r0","3.5.11-r0","3.5.12-r0","3.5.13-r0","3.5.14-r0","3.5.14-r1","3.5.15-r0","3.5.15-r1","3.5.16-r0","3.5.17-r0","3.5.17-r1","3.5.19-r0","3.5.19-r1","3.5.2-r0","3.5.2-r1","3.5.20-r0","3.5.20-r1","3.5.20-r2","3.5.22-r0","3.5.23-r0","3.5.23-r1","3.5.23-r2","3.5.23-r3","3.5.23-r4","3.5.27-r0","3.5.27-r1","3.5.27-r2","3.5.28-r0","3.5.3-r0","3.5.4-r0","3.5.4-r1","3.5.5-r0","3.5.6-r0","3.5.6-r1","3.5.7-r0","3.5.8-r0","4.10-r0","4.13-r0","4.14-r0","4.2-r0","4.2-r1","4.4-r0","4.4-r1","4.6-r0","4.6-r1","4.8-r0","4.8-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31806.json"}},{"package":{"name":"squid","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/squid?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15-r0"}]}],"versions":["2.7.6-r0","2.7.6-r1","2.7.6-r10","2.7.6-r11","2.7.6-r12","2.7.6-r2","2.7.6-r3","2.7.6-r4","2.7.6-r5","2.7.6-r6","2.7.6-r7","2.7.6-r8","2.7.6-r9","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.7-r5","2.7.9-r0","2.7.9-r1","2.7.9-r2","2.7.9-r3","2.7.9-r4","3.2.0.12-r1","3.2.0.12-r2","3.2.0.12-r3","3.2.0.12-r4","3.2.0.13-r0","3.2.0.16-r0","3.2.0.17-r0","3.2.0.17-r1","3.2.0.17-r2","3.2.0.18-r0","3.2.0.18-r1","3.2.0.19-r0","3.2.0.19-r1","3.2.2-r0","3.2.3-r0","3.2.4-r0","3.2.5-r0","3.2.6-r0","3.2.6-r1","3.2.7-r1","3.2.7-r2","3.3.10-r0","3.3.11-r0","3.3.11-r1","3.3.2-r0","3.3.3-r0","3.3.4-r0","3.3.5-r0","3.3.6-r0","3.3.7-r0","3.3.8-r0","3.3.8-r1","3.3.9-r0","3.4.10-r0","3.4.11-r0","3.4.12-r0","3.4.5-r0","3.4.6-r0","3.4.6-r1","3.4.7-r0","3.4.8-r0","3.4.9-r0","3.5.10-r0","3.5.11-r0","3.5.12-r0","3.5.13-r0","3.5.14-r0","3.5.14-r1","3.5.15-r0","3.5.15-r1","3.5.16-r0","3.5.17-r0","3.5.17-r1","3.5.19-r0","3.5.19-r1","3.5.2-r0","3.5.2-r1","3.5.20-r0","3.5.20-r1","3.5.20-r2","3.5.22-r0","3.5.23-r0","3.5.23-r1","3.5.23-r2","3.5.23-r3","3.5.23-r4","3.5.27-r0","3.5.27-r1","3.5.27-r2","3.5.28-r0","3.5.3-r0","3.5.4-r0","3.5.4-r1","3.5.5-r0","3.5.6-r0","3.5.6-r1","3.5.7-r0","3.5.8-r0","4.10-r0","4.13-r0","4.14-r0","4.2-r0","4.2-r1","4.4-r0","4.4-r1","4.6-r0","4.6-r1","4.8-r0","4.8-r1","4.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31806.json"}},{"package":{"name":"squid","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/squid?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15-r0"}]}],"versions":["2.7.6-r0","2.7.6-r1","2.7.6-r10","2.7.6-r11","2.7.6-r12","2.7.6-r2","2.7.6-r3","2.7.6-r4","2.7.6-r5","2.7.6-r6","2.7.6-r7","2.7.6-r8","2.7.6-r9","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.7-r5","2.7.9-r0","2.7.9-r1","2.7.9-r2","2.7.9-r3","2.7.9-r4","3.2.0.12-r1","3.2.0.12-r2","3.2.0.12-r3","3.2.0.12-r4","3.2.0.13-r0","3.2.0.16-r0","3.2.0.17-r0","3.2.0.17-r1","3.2.0.17-r2","3.2.0.18-r0","3.2.0.18-r1","3.2.0.19-r0","3.2.0.19-r1","3.2.2-r0","3.2.3-r0","3.2.4-r0","3.2.5-r0","3.2.6-r0","3.2.6-r1","3.2.7-r1","3.2.7-r2","3.3.10-r0","3.3.11-r0","3.3.11-r1","3.3.2-r0","3.3.3-r0","3.3.4-r0","3.3.5-r0","3.3.6-r0","3.3.7-r0","3.3.8-r0","3.3.8-r1","3.3.9-r0","3.4.10-r0","3.4.11-r0","3.4.12-r0","3.4.5-r0","3.4.6-r0","3.4.6-r1","3.4.7-r0","3.4.8-r0","3.4.9-r0","3.5.10-r0","3.5.11-r0","3.5.12-r0","3.5.13-r0","3.5.14-r0","3.5.14-r1","3.5.15-r0","3.5.15-r1","3.5.16-r0","3.5.17-r0","3.5.17-r1","3.5.19-r0","3.5.19-r1","3.5.2-r0","3.5.2-r1","3.5.20-r0","3.5.20-r1","3.5.20-r2","3.5.22-r0","3.5.23-r0","3.5.23-r1","3.5.23-r2","3.5.23-r3","3.5.23-r4","3.5.27-r0","3.5.27-r1","3.5.27-r2","3.5.28-r0","3.5.3-r0","3.5.4-r0","3.5.4-r1","3.5.5-r0","3.5.6-r0","3.5.6-r1","3.5.7-r0","3.5.8-r0","4.10-r0","4.11-r0","4.13-r0","4.14-r0","4.2-r0","4.2-r1","4.4-r0","4.4-r1","4.6-r0","4.6-r1","4.8-r0","4.8-r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