Vulnerability in GNOME Geary
CVE-2020-24661
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- GNOME Geary
- Fedoraproject Fedora — versions 31, 32
Weakness classification (CWE)
References
- gitlab.gnome.org/GNOME/geary/-/issues/866 (Exploit, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- tools.cisco.com/security/center/content/CiscoSeg/message/NS6CSTOBVO5HSAR3X5CT6D… (vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2020-24661?
- CVE-2020-24661 is a medium-severity vulnerability in GNOME Geary, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2020-08-26.
- How severe is CVE-2020-24661?
- Medium severity. CVSS v3 base score is 5.9 out of 10.