GNOME Geary before 3.36.3 mishandles pinned TLS certificate verification for IMAP and SMTP services using invalid TLS certificates (e.g., self-signed certificates) when the client system is not configured to use a system-provided PKCS#11 store. This allows a meddler in the middle to present a different invalid certificate to intercept incoming and outgoing mail.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24661
Reference (s):
- CISCO:20200902 Cisco Jabber for Windows Information Disclosure Vulnerability
- URL: https://tools.cisco.com/security/center/content/CiscoSeg/message/NS6CSTOBVO5HSAR3X5CT6DS6QDHXDB26/
- FEDORA:FEDORA-2020-95f2c5cc25
- URL: https://lists.fedoraproject.org/archives/list/[email protected]/message/G7OTYTGND6EFOKNQJWCHKKXKSN7SM73Y/
- FEDORA:FEDORA-2020-d445fb484a