CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
52.7%
Matrix is an ecosystem for open federated Instant Messaging and VoIP. Synapse is a reference “homeserver” implementation of Matrix. A malicious or poorly-implemented homeserver can inject malformed events into a room by specifying a different room id in the path of a /send_join
, /send_leave
, /invite
or /exchange_third_party_invite
request. This can lead to a denial of service in which future events will not be correctly sent to other servers over federation. This affects any server which accepts federation requests from untrusted servers. The Matrix Synapse reference implementation before version 1.23.1 the implementation is vulnerable to this injection attack. Issue is fixed in version 1.23.1. As a workaround homeserver administrators could limit access to the federation API to trusted servers (for example via federation_domain_whitelist
).
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.13-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.14-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.15-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.16-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.17-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.18-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.19-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
Alpine | 3.20-community | noarch | synapse | < 1.24.0-r0 | UNKNOWN |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
52.7%