CVE-2017-17846

Publication date 27 December 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in Enigmail before 1.9.9. Regular expressions are exploitable for Denial of Service, because of attempts to match arbitrarily long strings, aka TBE-01-003.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
enigmail	17.10 artful	Fixed 2:1.9.9-0ubuntu0.17.10.1
	17.04 zesty	Ignored end of life
	16.04 LTS xenial	Fixed 2:1.9.9-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 2:1.9.9-0ubuntu0.14.04.1

How can I get the fixes?
What do statuses mean?

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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

References

MITRE
NVD
Launchpad
Debian

Other references

https://enigmail.net/download/other/Enigmail%20Pentest%20Report%20by%20Cure53%20-%20Excerpt.pdf
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@enigmail.net/msg04280.html
https://www.cve.org/CVERecord?id=CVE-2017-17846