CVE-2019-8338

low-risk
Published 2019-05-16

The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email with an invalid signature. Also, it does not verify the validity of the signing key, which allows remote attackers to spoof arbitrary email signatures by crafting a key with a fake user ID (email address) and injecting it into the user's keyring.

Do I need to act?

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0.34% chance of exploitation
EPSS score — low exploit probability
-
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)

Gpg-Pgp

Affected Vendors

Gpg-Pgp Project

References (12)

Third Party Advisory http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
Mailing List http://seclists.org/fulldisclosure/2019/Apr/38
Patch https://github.com/Airmail/AirmailPlugIn-Framework/commits/master
Third Party Advisory https://github.com/RUB-NDS/Johnny-You-Are-Fired
Third Party Advisory https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.p...
Mailing List https://www.openwall.com/lists/oss-security/2019/04/30/4
Third Party Advisory http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
Mailing List http://seclists.org/fulldisclosure/2019/Apr/38
Patch https://github.com/Airmail/AirmailPlugIn-Framework/commits/master
Third Party Advisory https://github.com/RUB-NDS/Johnny-You-Are-Fired
Third Party Advisory https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.p...
Mailing List https://www.openwall.com/lists/oss-security/2019/04/30/4
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal