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CVE-2019-8338

5.9 · MEDIUM

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…

Published May 16, 2019CWE-347EPSS 1.73%

Overview

CVE-2019-8338 is a medium-severity vulnerability. It was published on May 16, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlRefseclists.org/fulldisclosure/2019/Apr/38GitHubgithub.com/Airmail/AirmailPlugIn-Framework/commits/masterGitHubgithub.com/RUB-NDS/Johnny-You-Are-FiredGitHubgithub.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdfRefwww.openwall.com/lists/oss-security/2019/04/30/4Refpacketstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlRefseclists.org/fulldisclosure/2019/Apr/38GitHubgithub.com/Airmail/AirmailPlugIn-Framework/commits/masterGitHubgithub.com/RUB-NDS/Johnny-You-Are-Fired

How CyberStrike helps

Frequently asked questions

What is CVE-2019-8338?

CVE-2019-8338 is a medium-severity vulnerability. It was published on May 16, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2019-8338?

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-8338?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-8338?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-8338 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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