CVE-2017-17847 Information

Description

An issue was discovered in Enigmail before 1.9.9. Signature spoofing is possible because the UI does not properly distinguish between an attachment signature and a signature that applies to the entire containing message aka TBE-01-021. This is demonstrated by an e-mail message with an attachment that is a signed e-mail message in message/rfc822 format.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://enigmail.net/download/other/Enigmail20Pentest20Report20by20Cure5320-20Excerpt.pdf https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html https://lists.debian.org/debian-security-announce/2017/msg00333.html https://sourceforge.net/p/enigmail/bugs/709/ https://www.debian.org/security/2017/dsa-4070 https://www.mail-archive.com/enigmail-users@enigmail.net/msg04280.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5