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.

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

EPSS: 0.009 (56.7th percentile) — read the EPSS interpretation.

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.

Affected products

Gnome Geary
Fedoraproject Fedora — versions 31, 32
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
cve@mitre.org (x_refsource_CISCO, 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.