{"id":"UBUNTU-CVE-2020-37248","details":"OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIPTLS/man-in-the-middle attacks, taking over the connection and extracting account credentials in cleartext.","modified":"2026-06-11T12:41:55Z","published":"2026-06-08T16:16:00Z","upstream":["CVE-2020-37248"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-37248"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-37248"},{"type":"REPORT","url":"https://github.com/OfflineIMAP/offlineimap3/issues/222"},{"type":"REPORT","url":"https://github.com/OfflineIMAP/offlineimap/issues/669"},{"type":"REPORT","url":"https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74"},{"type":"REPORT","url":"https://pypi.org/project/offlineimap/#history"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/06/08/3"}],"affected":[{"package":{"name":"offlineimap3","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/offlineimap3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~git20210225.1e7ef9e+dfsg-4","0.0~git20211018.e64c254+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"offlineimap","binary_version":"7.3.3+dfsg1-1+0.0~git20211018.e64c254+dfsg-1"},{"binary_name":"offlineimap3","binary_version":"0.0~git20211018.e64c254+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37248.json"}},{"package":{"name":"offlineimap3","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/offlineimap3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~git20230519.c9f44ad+dfsg-1","0.0~git20231201.77e70ed+dfsg-1","0.0~git20231218.d29a4dc+dfsg-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.3.3+dfsg1-1+0.0~git20231218.d29a4dc+dfsg-3ubuntu1","binary_name":"offlineimap"},{"binary_name":"offlineimap3","binary_version":"0.0~git20231218.d29a4dc+dfsg-3ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37248.json"}},{"package":{"name":"offlineimap3","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/offlineimap3?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~git20240826.db34745+dfsg-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.3.3+dfsg1-1+0.0~git20240826.db34745+dfsg-2ubuntu1","binary_name":"offlineimap"},{"binary_version":"0.0~git20240826.db34745+dfsg-2ubuntu1","binary_name":"offlineimap3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37248.json"}},{"package":{"name":"offlineimap3","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/offlineimap3?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~git20240826.db34745+dfsg-2ubuntu1","0.0~git20240826.db34745+dfsg-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"7.3.3+dfsg1-1+0.0~git20240826.db34745+dfsg-2ubuntu2","binary_name":"offlineimap"},{"binary_name":"offlineimap3","binary_version":"0.0~git20240826.db34745+dfsg-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37248.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:H/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}