{"id":"UBUNTU-CVE-2021-46784","details":"In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.","modified":"2026-01-30T00:47:57.080263Z","published":"2021-12-31T00:00:00Z","related":["USN-5491-1"],"upstream":["CVE-2021-46784"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-46784"},{"type":"REPORT","url":"https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5491-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-46784"}],"affected":[{"package":{"name":"squid3","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm6?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.8-1ubuntu16","3.3.8-1ubuntu17","3.5.12-1ubuntu6","3.5.12-1ubuntu7","3.5.12-1ubuntu7.1","3.5.12-1ubuntu7.2","3.5.12-1ubuntu7.3","3.5.12-1ubuntu7.4","3.5.12-1ubuntu7.5","3.5.12-1ubuntu7.6","3.5.12-1ubuntu7.7","3.5.12-1ubuntu7.8","3.5.12-1ubuntu7.9","3.5.12-1ubuntu7.10","3.5.12-1ubuntu7.11","3.5.12-1ubuntu7.12","3.5.12-1ubuntu7.13","3.5.12-1ubuntu7.14","3.5.12-1ubuntu7.15","3.5.12-1ubuntu7.16","3.5.12-1ubuntu7.16+esm1","3.5.12-1ubuntu7.16+esm2","3.5.12-1ubuntu7.16+esm3","3.5.12-1ubuntu7.16+esm4","3.5.12-1ubuntu7.16+esm5","3.5.12-1ubuntu7.16+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"squid","binary_version":"3.5.12-1ubuntu7.16+esm6"},{"binary_version":"3.5.12-1ubuntu7.16+esm6","binary_name":"squid-cgi"},{"binary_name":"squid-common","binary_version":"3.5.12-1ubuntu7.16+esm6"},{"binary_name":"squid-purge","binary_version":"3.5.12-1ubuntu7.16+esm6"},{"binary_name":"squid3","binary_version":"3.5.12-1ubuntu7.16+esm6"},{"binary_name":"squidclient","binary_version":"3.5.12-1ubuntu7.16+esm6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46784.json"}},{"package":{"name":"squid3","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.13?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.27-1ubuntu1.13"}]}],"versions":["3.5.23-5ubuntu1","3.5.23-5ubuntu2","3.5.27-1ubuntu1","3.5.27-1ubuntu1.1","3.5.27-1ubuntu1.2","3.5.27-1ubuntu1.3","3.5.27-1ubuntu1.4","3.5.27-1ubuntu1.5","3.5.27-1ubuntu1.6","3.5.27-1ubuntu1.7","3.5.27-1ubuntu1.8","3.5.27-1ubuntu1.9","3.5.27-1ubuntu1.10","3.5.27-1ubuntu1.11","3.5.27-1ubuntu1.12"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"3.5.27-1ubuntu1.13"},{"binary_name":"squid-cgi","binary_version":"3.5.27-1ubuntu1.13"},{"binary_name":"squid-common","binary_version":"3.5.27-1ubuntu1.13"},{"binary_name":"squid-purge","binary_version":"3.5.27-1ubuntu1.13"},{"binary_name":"squid3","binary_version":"3.5.27-1ubuntu1.13"},{"binary_version":"3.5.27-1ubuntu1.13","binary_name":"squidclient"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46784.json"}},{"package":{"name":"squid","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/squid@4.10-1ubuntu1.6?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10-1ubuntu1.6"}]}],"versions":["4.8-1ubuntu2","4.8-1ubuntu3","4.9-2ubuntu1","4.9-2ubuntu2","4.9-2ubuntu3","4.9-2ubuntu4","4.10-1ubuntu1","4.10-1ubuntu1.1","4.10-1ubuntu1.2","4.10-1ubuntu1.3","4.10-1ubuntu1.4","4.10-1ubuntu1.5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"4.10-1ubuntu1.6"},{"binary_name":"squid-cgi","binary_version":"4.10-1ubuntu1.6"},{"binary_name":"squid-common","binary_version":"4.10-1ubuntu1.6"},{"binary_name":"squid-purge","binary_version":"4.10-1ubuntu1.6"},{"binary_version":"4.10-1ubuntu1.6","binary_name":"squidclient"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46784.json"}},{"package":{"name":"squid","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/squid@5.2-1ubuntu4.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2-1ubuntu4.1"}]}],"versions":["4.13-10ubuntu5","5.2-1ubuntu1","5.2-1ubuntu3","5.2-1ubuntu4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"5.2-1ubuntu4.1"},{"binary_name":"squid-cgi","binary_version":"5.2-1ubuntu4.1"},{"binary_name":"squid-common","binary_version":"5.2-1ubuntu4.1"},{"binary_name":"squid-openssl","binary_version":"5.2-1ubuntu4.1"},{"binary_name":"squid-purge","binary_version":"5.2-1ubuntu4.1"},{"binary_version":"5.2-1ubuntu4.1","binary_name":"squidclient"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46784.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}