{"id":"UBUNTU-CVE-2025-61962","details":"In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context.","modified":"2026-05-20T16:23:39.933767026Z","published":"2025-10-04T03:15:00Z","related":["USN-7838-1"],"upstream":["CVE-2025-61962"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-61962"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-61962"},{"type":"REPORT","url":"https://www.fetchmail.info/fetchmail-SA-2025-01.txt"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2025/10/03/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7838-1"}],"affected":[{"package":{"name":"fetchmail","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.26-1","6.3.26-2"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.3.26-2"},{"binary_version":"6.3.26-2","binary_name":"fetchmailconf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.26-3","6.3.26-3build1","6.3.26-3ubuntu0.1~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.3.26-3ubuntu0.1~18.04.1"},{"binary_name":"fetchmailconf","binary_version":"6.3.26-3ubuntu0.1~18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.0~rc4-1ubuntu1","6.4.1-1ubuntu1","6.4.2-2"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.4.2-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.27-1ubuntu0.1"}]}],"versions":["6.4.22-1","6.4.23-1","6.4.24-1","6.4.25-1","6.4.26-1","6.4.27-1"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.4.27-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.38-1ubuntu4.1"}]}],"versions":["6.4.37-1","6.4.38-1ubuntu1","6.4.38-1ubuntu3","6.4.38-1ubuntu4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"6.4.38-1ubuntu4.1","binary_name":"fetchmail"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.4-0ubuntu2"}]}],"versions":["6.4.39-1","6.5.4-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.5.4-0ubuntu2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/fetchmail?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.4-0ubuntu2"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.5.4-0ubuntu2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61962.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}