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.
References (9)
Core 9
Core References
Third Party Advisory x_refsource_misc
https://sourceforge.net/p/enigmail/bugs/709/
Mailing List, Third Party Advisory x_refsource_misc
https://lists.debian.org/debian-security-announce/2017/msg00333.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2017/dsa-4070
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2019/04/30/4
Mailing List, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2019/Apr/38
Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
Various Sources x_refsource_misc
https://github.com/RUB-NDS/Johnny-You-Are-Fired
Various Sources x_refsource_misc
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
Scores
CVSS v3
7.5
EPSS
0.0087
EPSS Percentile
75.4%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-347
Status
published
Products (4)
debian/debian_linux
7.0
debian/debian_linux
8.0
debian/debian_linux
9.0
enigmail/enigmail
< 1.9.9
Published
Dec 27, 2017
Tracked Since
Feb 18, 2026