CVE-2019-12855

Publication date 16 June 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In words.protocols.jabber.xmlstream in Twisted through 19.2.1, XMPP support did not verify certificates when used with TLS, allowing an attacker to MITM connections.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
twisted	19.10 eoan	Fixed 18.9.0-3ubuntu1.1
	19.04 disco	Ignored end of life
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Fixed 17.9.0-2ubuntu0.1
	16.04 LTS xenial	Fixed 16.0.0-1ubuntu0.4
	14.04 LTS trusty	Fixed 13.2.0-1ubuntu1.2+esm1
twisted-py3	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
twisted	Upstream: cf8ed69

Severity score breakdown

Parameter	Value
Base score	7.4 · High
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N