PT-2019-17843 · Matrix+2 · Matrix Synapse+2

Neil Johnson · Published 2019-02-07 · Updated 2024-06-15 · CVE-2019-5885

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Matrix Synapse versions prior to 0.34.0.1

Description The issue allows remote attackers to impersonate users due to the use of a predictable value to derive a secret key and other secrets when the macaroon secret key authentication parameter is not set.

Recommendations For versions prior to 0.34.0.1, update to version 0.34.0.1 or later to resolve the issue. As a temporary workaround, consider setting the macaroon secret key authentication parameter to a unique and unpredictable value to minimize the risk of exploitation.

Fix

Use of Insufficiently Random Values

Weakness Enumeration

CWE-330

Related Identifiers

ALT-PU-2019-1189

CVE-2019-5885

GHSA-JRQM-V8CV-53WW

OPENSUSE-SU-2024:11041-1

PYSEC-2019-187

USN-6076-1

Affected Products

Alt Linux

Matrix Synapse

Ubuntu

References · 51

• https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-10657 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16515 · Security Note
• https://ubuntu.com/security/CVE-2018-12291 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-12423 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18835 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-5885 · Vendor Advisory
• https://errata.altlinux.org/ALT-PU-2019-1189 · Vendor Advisory
• https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-5885 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-5885 · Security Note
• https://ubuntu.com/security/CVE-2019-11842 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-jrqm-v8cv-53ww · Vendor Advisory
• https://osv.dev/vulnerability/USN-6076-1 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10657 · Security Note