What’s Vulnerable › Vulnerabilities
CVE-2017-17843
- Severity: medium (CVSS 5.9 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2017-12-27 · updated 2026-06-17
Description
An issue was discovered in Enigmail before 1.9.9 that allows remote attackers to trigger use of an intended public key for encryption, because incorrect regular expressions are used for extraction of an e-mail address from a comma-separated list, as demonstrated by a modified Full Name field and a homograph attack, aka TBE-01-002.
Affected products
- Debian Linux: 8.0, 9.0
- Enigmail: before 1.9.9 — fixed in 1.9.9
How to fix
Upgrade to a fixed version: Enigmail 1.9.9. Check the vendor advisory for mitigations.
References
- https://enigmail.net/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf
- https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html
- https://lists.debian.org/debian-security-announce/2017/msg00333.html
- https://www.debian.org/security/2017/dsa-4070
- https://www.mail-archive.com/enigmail-users%40enigmail.net/msg04280.html
- https://enigmail.net/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf
- https://lists.debian.org/debian-lts-announce/2017/12/msg00021.html
- https://lists.debian.org/debian-security-announce/2017/msg00333.html
- https://www.debian.org/security/2017/dsa-4070
- https://www.mail-archive.com/enigmail-users%40enigmail.net/msg04280.html
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