CVE-2017-17847 json
An issue was discovered in Enigmail before 1.9.9.
published 2017-12-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-8994
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- enigmail enigmail 1.9.9
- enigmail Debian 11 2:1.9.9-1
debian advisories DEBIAN-CVE-2017-17847
- enigmail Ubuntu 14.04 LTS 2:1.9.9-0ubuntu0.14.04.1
- enigmail Ubuntu 16.04 LTS 2:1.9.9-0ubuntu0.16.04.1
ubuntu advisories UBUNTU-CVE-2017-17847
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
debian.org
/security/2017/dsa-4070
vendor-advisory, third-party-advisory
-
enigmail.net
/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf
vendor-advisory
-
sourceforge.net
/p/enigmail/bugs/709/
third-party-advisory
-
lists.debian.org
/debian-security-announce/2017/msg00333.html
third-party-advisory
- mail-archive.com /enigmail-users%40enigmail.net/msg04280.html
-
lists.debian.org
/debian-lts-announce/2017/12/msg00021.html
mailing-list
Sources
- CVE List CVE-2017-17847
- NVD CVE-2017-17847
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.