Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.

The remote Ubuntu 18.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6076-1 advisory.

    It was discovered that Synapse incorrectly handled certain inputs. If a user or an automated system were     tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to     cause a denial of service. (CVE-2019-18835, CVE-2018-12291, CVE-2018-10657)

    It was discovered that Synapse incorrectly handled certain inputs. If a user or an automated system were     tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to     hijack the session. (CVE-2019-11842, CVE-2018-12423)

    It was discovered that Synapse incorrectly handled certain inputs. If a user or an automated system were     tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to     perform

    spoofing or user impersonation. (CVE-2019-5885, CVE-2018-16515)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Fix for CVE-2019-5885

Upgrade notes available at https://github.com/matrix-org/synapse/blob/v0.34.0/UPGRADE.rst#upgradi ng-to-v0340 - Note this continues to use Python 2.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Fix for CVE-2019-5885

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Matrix developers report :

The matrix team announces the availablility of synapse security releases 0.34.0.1 and 0.34.1.1, fixing CVE-2019-5885.

ID	Name	Product	Family	Severity
175821	Ubuntu 18.04 ESM : Synapse vulnerabilities (USN-6076-1)	Nessus	Ubuntu Local Security Checks	critical
121323	Fedora 28 : matrix-synapse (2019-c6044b3fce)	Nessus	Fedora Local Security Checks	high
121319	Fedora 29 : matrix-synapse (2019-4d914f9257)	Nessus	Fedora Local Security Checks	high
121199	FreeBSD : py-matrix-synapse -- undisclosed vulnerability (383931ba-1818-11e9-92ea-448a5b29e8a9)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2019-5885

high

Tenable Plugins

critical

high

high

high