Denial Of Service (DoS)

matrix-synapse is vulnerable to denial of service. Lack of input validation of some parameters on the endpoints used to confirm third-party identifiers could allows an attacker to cause excessive use of disk space and memory leading to resource exhaustion...

Denial Of Service (DoS)

matrix-synapse is vulnerable to denial of service. The vulnerability exists due to missing input validation of some parameters on the endpoints used to confirm third-party identifiers...

GHSA-JRH7-MHHX-6H88 Denial of service (via resource exhaustion) due to improper input validation on groups/communities endpoints

Impact Missing input validation of some parameters on the groups also known as communities endpoints could cause excessive use of disk space and memory leading to resource exhaustion. Additionally clients may have issues rendering large fields. Patches This issue is fixed by 9321 and 9393...

CVE-2021-21393

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

CVE-2021-21392

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

DEBIAN-CVE-2021-21392

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21393

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

Design/Logic Flaw

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21393

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

Input validation

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

CVE-2021-21392

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

PYSEC-2021-26

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

PYSEC-2021-25

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392 Open redirect via transitional IPv6 addresses on dual-stack networks

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392

Synapse (matrix-synapse) prior to version 1.28.0 is affected by a vulnerability where requests to user-provided domains could escape external IP restrictions on dual-stack networks due to transitional IPv6 addresses. This may allow outbound requests to internal infrastructure during federation, i...

CVE-2021-21393

Summary: CVE-2021-21393 affects Synapse (matrix-synapse) prior to version 1.28.0, where missing input validation on endpoints that confirm third-party identifiers could allow excessive disk space and memory use, causing resource exhaustion. The issue is not part of the Matrix specification; maxim...

CVE-2021-21393 Denial of service (via resource exhaustion) due to improper input validation on groups/communities endpoints

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

CVE-2021-21393

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...

CVE-2021-21394

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...