VDB-117313 · CVE-2018-10657 · Nessus 120912

Matrix Synapse up to 0.28.0 federation_base.py input validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Matrix Synapse up to 0.28.0. It has been rated as problematic. This impacts an unknown function of the file federation/federation_base.py. This manipulation causes input validation. This vulnerability appears as CVE-2018-10657. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Matrix Synapse up to 0.28.0. It has been declared as problematic. Affected by this vulnerability is an unknown function of the file federation/federation_base.py. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.

The bug was discovered 05/01/2018. The weakness was presented 05/02/2018 (GitHub Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2018-10657 since 05/02/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a private exploit are known.

It is declared as attacked. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 120912 (Fedora 28 : matrix-synapse (2018-f513267ac5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading to version 0.28.1 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (497) and Tenable (120912). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Matrix

Name

Synapse

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 120912
Nessus Name: Fedora 28 : matrix-synapse (2018-f513267ac5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855089
OpenVAS Name: Fedora Update for matrix-synapse FEDORA-2018-f513267ac5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Synapse 0.28.1
Patch: github.com

Timelineinfo

05/01/2018 🔍
05/02/2018 +0 days 🔍
05/02/2018 +0 days 🔍
05/02/2018 +0 days 🔍
05/03/2018 +1 days 🔍
05/15/2018 +12 days 🔍
01/03/2019 +233 days 🔍
07/05/2024 +2010 days 🔍