Skip to content

Improper Certificate Validation in Twisted

High severity GitHub Reviewed Published Aug 16, 2019 to the GitHub Advisory Database • Updated Aug 31, 2023

Package

pip twisted (pip)

Affected versions

< 19.7.0

Patched versions

19.7.0

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.

References

Published by the National Vulnerability Database Jun 16, 2019
Reviewed Aug 12, 2019
Published to the GitHub Advisory Database Aug 16, 2019
Last updated Aug 31, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.386%
(73rd percentile)

Weaknesses

CVE ID

CVE-2019-12855

GHSA ID

GHSA-65rm-h285-5cc5

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.