Matrix Synapse up to 1.4.x Signature /send_join signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Matrix Synapse up to 1.4.x. This affects an unknown part of the file /send_join of the component Signature Handler. The manipulation leads to signature verification. This vulnerability is referenced as CVE-2019-18835. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Matrix Synapse up to 1.4.x. This issue affects some unknown processing of the file /send_join of the component Signature Handler. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.

The weakness was published 11/08/2019. The identification of this vulnerability is CVE-2019-18835 since 11/07/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.5.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Synapse 1.5.0
Patch: github.com

Timelineinfo

11/07/2019 🔍
11/08/2019 +1 days 🔍
11/08/2019 +0 days 🔍
02/05/2024 +1550 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2019-18835 (🔍)
GCVE (CVE): GCVE-0-2019-18835
GCVE (VulDB): GCVE-100-145235

Entryinfo

Created: 11/08/2019 11:24
Updated: 02/05/2024 16:37
Changes: 11/08/2019 11:24 (38), 11/08/2019 11:29 (17), 02/05/2024 16:37 (6)
Complete: 🔍
Cache ID: 216::103

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