CVE-2019-8338

Name: CVE-2019-8338
Creator: NVD / NIST
Published: 2019-05-16T17:29:01.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.73%

Last modified Jun 17, 2026

CVE-2019-8338 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.73% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.73%

74.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Gpg-Pgp Project	Gpg-Pgp	<= 1.0\(9\)

References

http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
https://github.com/Airmail/AirmailPlugIn-Framework/commits/masterPatch, Third Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-FiredThird Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdfThird Party Advisory
https://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
https://github.com/Airmail/AirmailPlugIn-Framework/commits/masterPatch, Third Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-FiredThird Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdfThird Party Advisory
https://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory

Timeline

Published: May 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-8338?

How severe is CVE-2019-8338?

Severity scoring for CVE-2019-8338 is pending analysis. The EPSS model estimates a 1.73% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-8338?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST