CVE-2018-18509

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

Un fallo durante la comprobación de ciertas firmas S/MIME produce correos electrónicos que se mostrarán en Thunderbird con una firma digital válida, incluso si el contenido del mensaje mostrado no está cubierto por la firma. El fallo le permite a un atacante reutilizar una firma S/MIME válida para poder elaborar un mensaje de correo electrónico con contenido arbitrario. Esta vulnerabilidad afecta a Thunderbird versiones <60.5.1.