CVE-2019-8338 – Johnny You Are Fired

https://notcve.org/view.php?id=CVE-2019-8338

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. La rutina de verificación de firmas en Airmail GPG-PGP Plugin, versiones 1.0 (9) y anteriores, no comprueba el estado de la firma en absoluto, lo cual permite a los atacantes remotos falsificar firmas de correo electrónico arbitrarias al crear un correo electrónico firmado con una firma no válida. Además, no comprueba la validez de la clave de firma, lo que permite a los atacantes remotos falsificar firmas de correo electrónico arbitrarias al crear una clave con un ID de usuario falso (email address) e inyectarla en el llavero de usuarios. • http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html http://seclists.org/fulldisclosure/2019/Apr/38 https://github.com/Airmail/AirmailPlugIn-Framework/commits/master https://github.com/RUB-NDS/Johnny-You-Are-Fired https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf https://www.openwall.com/lists/oss-security/2019/04/30/4 • CWE-347: Improper Verification of Cryptographic Signature •