{"id":"USN-5491-1","summary":"squid, squid3 vulnerability","details":"Joshua Rogers discovered that Squid incorrectly handled the Gopher\nprotocol. A remote attacker could possibly use this issue to cause Squid to\ncrash, resulting in a denial of service.\n","modified":"2026-04-27T16:12:32.390198Z","published":"2022-06-22T14:03:19Z","related":["UBUNTU-CVE-2021-46784"],"upstream":["CVE-2021-46784","UBUNTU-CVE-2021-46784"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5491-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-46784"}],"affected":[{"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_version":"3.5.27-1ubuntu1.13","binary_name":"squid-purge"},{"binary_name":"squid3","binary_version":"3.5.27-1ubuntu1.13"},{"binary_name":"squidclient","binary_version":"3.5.27-1ubuntu1.13"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-46784","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5491-1.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":{"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_name":"squidclient","binary_version":"4.10-1ubuntu1.6"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2021-46784","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5491-1.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":{"binaries":[{"binary_name":"squid","binary_version":"5.2-1ubuntu4.1"},{"binary_version":"5.2-1ubuntu4.1","binary_name":"squid-cgi"},{"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_name":"squidclient","binary_version":"5.2-1ubuntu4.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-46784"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5491-1.json"}}],"schema_version":"1.7.5"}