PT-2019-12248 · Matrix · Matrix Sydent

Published 2019-04-19 · Updated 2023-02-28 · CVE-2019-11340

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Matrix Sydent versions prior to 1.0.2

Description The issue arises from the handling of registration restrictions based on e-mail domain in util/emailutils.py. Specifically, when the allowed local 3pids option is enabled, it can lead to potentially unwanted behavior. This is due to how Python's email.utils.parseaddr function handles certain email addresses. For example, when applied to an address like [e-mail]@good.example.com, it returns the [e-mail] substring, which may not be the intended outcome.

Recommendations For versions prior to 1.0.2, update to version 1.0.2 or later to resolve the issue. As a temporary workaround, consider disabling the allowed local 3pids option until the update can be applied.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2019-11340

DLA-2280-1

GHSA-Q9H8-GPW5-C95C

Affected Products

Matrix Sydent

References · 9

• https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc · Patch
• https://github.com/matrix-org/sydent/compare/7c002cd...09278fb · Patch
• https://osv.dev/vulnerability/CVE-2019-11340 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-11340 · Security Note
• https://osv.dev/vulnerability/DLA-2280-1 · Vendor Advisory
• https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-q9h8-gpw5-c95c · Vendor Advisory
• https://t.me/cvenotify/45148 · Telegram Post
• https://twitter.com/matrixdotorg/status/1118934335963500545 · Note