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matrix-synapse@1.91.0 vulnerabilities

Homeserver for the Matrix decentralised comms protocol

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Direct Vulnerabilities

Known vulnerabilities in the matrix-synapse package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Allocation of Resources Without Limits or Throttling

matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to a weakness in how the auth chain cover index is calculated. An attacker can induce high CPU consumption and accumulate excessive data in the database by dispatching specially crafted events.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade matrix-synapse to version 1.105.1 or higher.

[,1.105.1)
  • M
Information Exposure

matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.

Affected versions of this package are vulnerable to Information Exposure. An attacker can query remote users' device information which can be used to enumerate the remote users known to a homeserver.

How to fix Information Exposure?

Upgrade matrix-synapse to version 1.95.1 or higher.

[,1.95.1)
  • M
Allocation of Resources Without Limits or Throttling

matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the ACL event. An attacker can cause a denial of service by sending a malicious ACL event.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade matrix-synapse to version 1.94.0rc1 or higher.

[,1.94.0rc1)
  • M
Improper Input Validation

matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.

Affected versions of this package are vulnerable to Improper Input Validation due to the improper validation of receipts. An attacker can forge read receipts for any event by knowing the room ID and event ID.

How to fix Improper Input Validation?

Upgrade matrix-synapse to version 1.93.0 or higher.

[0.34.0,1.93.0)
  • M
Information Exposure

matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP.

Affected versions of this package are vulnerable to Information Exposure due to temporarily stored plaintext passwords in the server database. An attacker can potentially access these passwords if they have access to the database backups.

How to fix Information Exposure?

Upgrade matrix-synapse to version 1.93.0 or higher.

[1.66.0,1.93.0)
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