CVE-2020-12619

low-risk
Published 2020-08-20

MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.

Do I need to act?

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0.19% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Mailmate

Affected Vendors

Freron

References (4)

Release Notes https://updates.mailmate-app.com/2.0/release_notes
Third Party Advisory https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mail...
Release Notes https://updates.mailmate-app.com/2.0/release_notes
Third Party Advisory https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mail...
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal