{"id":"UBUNTU-CVE-2020-25097","details":"An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.","modified":"2026-01-30T01:07:15.992710Z","published":"2021-03-19T05:15:00Z","related":["USN-4895-1"],"upstream":["CVE-2020-25097"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25097"},{"type":"REPORT","url":"https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4895-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-25097"}],"affected":[{"package":{"name":"squid3","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.12-1ubuntu7.16"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"3.5.12-1ubuntu7.16"},{"binary_version":"3.5.12-1ubuntu7.16","binary_name":"squid-cgi"},{"binary_name":"squid-common","binary_version":"3.5.12-1ubuntu7.16"},{"binary_name":"squid-purge","binary_version":"3.5.12-1ubuntu7.16"},{"binary_name":"squid3","binary_version":"3.5.12-1ubuntu7.16"},{"binary_name":"squidclient","binary_version":"3.5.12-1ubuntu7.16"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25097.json"}},{"package":{"name":"squid3","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.10?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.27-1ubuntu1.10"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"3.5.27-1ubuntu1.10"},{"binary_name":"squid-cgi","binary_version":"3.5.27-1ubuntu1.10"},{"binary_version":"3.5.27-1ubuntu1.10","binary_name":"squid-common"},{"binary_name":"squid-purge","binary_version":"3.5.27-1ubuntu1.10"},{"binary_name":"squid3","binary_version":"3.5.27-1ubuntu1.10"},{"binary_name":"squidclient","binary_version":"3.5.27-1ubuntu1.10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25097.json"}},{"package":{"name":"squid","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/squid@4.10-1ubuntu1.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10-1ubuntu1.3"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"4.10-1ubuntu1.3"},{"binary_name":"squid-cgi","binary_version":"4.10-1ubuntu1.3"},{"binary_name":"squid-common","binary_version":"4.10-1ubuntu1.3"},{"binary_name":"squid-purge","binary_version":"4.10-1ubuntu1.3"},{"binary_name":"squidclient","binary_version":"4.10-1ubuntu1.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25097.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}