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Fencer Vulns
medium 5.9

CVE-2017-17843 json

An issue was discovered in Enigmail before 1.9.9 that allows remote attackers to trigger use of an intended public key for encryption, beca…

published 2017-12-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-8990

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

Patch / fix

  • enigmail enigmail 1.9.9
  • enigmail Debian 11 2:1.9.9-1

debian advisories DEBIAN-CVE-2017-17843

  • 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-2017-17843

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

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

References

Sources

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.