CVE-2017-17848 Information

Description

An issue was discovered in Enigmail before 1.9.9. In a variant of CVE-2017-17847 signature spoofing is possible for multipart/related messages because a signed message part can be referenced with a cid: URI but not actually displayed. In other words the entire containing message appears to be signed but the recipient does not see any of the signed text.

CVSS Vector

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

Reference

http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html http://seclists.org/fulldisclosure/2019/Apr/38 http://www.openwall.com/lists/oss-security/2019/04/30/4 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://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

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