CVE-2019-9148

low-risk
Published 2019-07-09

Mailvelope prior to 3.3.0 accepts or operates with invalid PGP public keys: Mailvelope allows importing keys that contain users without a valid self-certification. Keys that are obviously invalid are not rejected during import. An attacker that is able to get a victim to import a manipulated key could claim to have signed a message that originates from another person.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Mailvelope

Affected Vendors

Mailvelope

References (6)

Release Notes https://github.com/mailvelope/mailvelope/blob/master/Changelog.md#v330
Third Party Advisory https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvel...
Exploit https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvel...
Release Notes https://github.com/mailvelope/mailvelope/blob/master/Changelog.md#v330
Third Party Advisory https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvel...
Exploit https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvel...
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal