{"id":"USN-4981-1","summary":"squid, squid3 vulnerabilities","details":"Joshua Rogers discovered that Squid incorrectly handled requests with the\nurn: scheme. A remote attacker could possibly use this issue to cause\nSquid to consume resources, leading to a denial of service.\n(CVE-2021-28651)\n\nJoshua Rogers discovered that Squid incorrectly handled requests to the\nCache Manager API. A remote attacker with access privileges could possibly\nuse this issue to cause Squid to consume resources, leading to a denial of\nservice. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 20.10,\nand Ubuntu 21.04. (CVE-2021-28652)\n\nJoshua Rogers discovered that Squid incorrectly handled certain response\nheaders. A remote attacker could possibly use this issue to cause Squid to\ncrash, resulting in a denial of service. This issue was only affected\nUbuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-28662)\n\nJoshua Rogers discovered that Squid incorrectly handled range request\nprocessing. A remote attacker could possibly use this issue to cause Squid\nto crash, resulting in a denial of service. (CVE-2021-31806,\nCVE-2021-31807, CVE-2021-31808)\n\nJoshua Rogers discovered that Squid incorrectly handled certain HTTP\nresponses. A remote attacker could possibly use this issue to cause Squid\nto crash, resulting in a denial of service. (CVE-2021-33620)\n","modified":"2026-04-27T16:03:04.894949391Z","published":"2021-06-03T16:24:27Z","related":["UBUNTU-CVE-2021-28651","UBUNTU-CVE-2021-28652","UBUNTU-CVE-2021-28662","UBUNTU-CVE-2021-31806","UBUNTU-CVE-2021-31807","UBUNTU-CVE-2021-31808","UBUNTU-CVE-2021-33620"],"upstream":["CVE-2021-28651","CVE-2021-28652","CVE-2021-28662","CVE-2021-31806","CVE-2021-31807","CVE-2021-31808","CVE-2021-33620","UBUNTU-CVE-2021-28651","UBUNTU-CVE-2021-28652","UBUNTU-CVE-2021-28662","UBUNTU-CVE-2021-31806","UBUNTU-CVE-2021-31807","UBUNTU-CVE-2021-31808","UBUNTU-CVE-2021-33620"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4981-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28651"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28652"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28662"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-31806"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-31807"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-31808"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33620"}],"affected":[{"package":{"name":"squid3","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.11?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.27-1ubuntu1.11"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"squid","binary_version":"3.5.27-1ubuntu1.11"},{"binary_name":"squid-cgi","binary_version":"3.5.27-1ubuntu1.11"},{"binary_name":"squid-common","binary_version":"3.5.27-1ubuntu1.11"},{"binary_name":"squid-purge","binary_version":"3.5.27-1ubuntu1.11"},{"binary_name":"squid3","binary_version":"3.5.27-1ubuntu1.11"},{"binary_name":"squidclient","binary_version":"3.5.27-1ubuntu1.11"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4981-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-28651"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-28652"},{"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"}],"id":"CVE-2021-31806"},{"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"}],"id":"CVE-2021-31807"},{"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"}],"id":"CVE-2021-31808"},{"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":"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"}],"id":"CVE-2021-33620"}]}}},{"package":{"name":"squid","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/squid@4.10-1ubuntu1.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10-1ubuntu1.4"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"squid","binary_version":"4.10-1ubuntu1.4"},{"binary_name":"squid-cgi","binary_version":"4.10-1ubuntu1.4"},{"binary_name":"squid-common","binary_version":"4.10-1ubuntu1.4"},{"binary_name":"squid-purge","binary_version":"4.10-1ubuntu1.4"},{"binary_name":"squidclient","binary_version":"4.10-1ubuntu1.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4981-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-28651"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-28652"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-28662"},{"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"}],"id":"CVE-2021-31806"},{"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"}],"id":"CVE-2021-31807"},{"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"}],"id":"CVE-2021-31808"},{"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":"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"}],"id":"CVE-2021-33620"}]}}}],"schema_version":"1.7.5"}