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CVE-2020-24661

MEDIUM
5.9
CVSS Score
Published: August 26, 2020 at 03:06 PM UTC
Updated: June 17, 2026 at 03:05 AM UTC
2 products affected across 2 vendorsFedoraGeary

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.9%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3132
Geary· Gnome
95%
v < 3.36.3
Affected range stops below 3.36.3, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://gitlab.gnome.org/GNOME/geary/-/issues/866
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G7OTYTGND6EFOKNQJWCHKKXKSN7SM73Y/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NS6CSTOBVO5HSAR3X5CT6DS6QDHXDB26/
Vendor Advisoryx_refsource_CISCOBroken Link
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSeg/message/NS6CSTOBVO5HSAR3X5CT6DS6QDHXDB26/

CVSS

5.9MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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