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4 vulnerabilities found for matrix-appservice-bridge by matrix-org
CVE-2023-38691 (GCVE-0-2023-38691)
Vulnerability from nvd – Published: 2023-08-04 16:34 – Updated: 2024-10-07 13:01
VLAI
EPSS
VEX
Title
matrix-appservice-bridge doesn't verify the sub parameter of an openId token exhange, allowing unauthorized access to provisioning APIs
Summary
matrix-appservice-bridge provides an API for setting up bridges. Starting in version 4.0.0 and prior to versions 8.1.2 and 9.0.1, a malicious Matrix server can use a foreign user's MXID in an OpenID exchange, allowing a bad actor to impersonate users when using the provisioning API. The library does not check that the servername part of the `sub` parameter (containing the user's *claimed* MXID) is the the same as the servername we are talking to. A malicious actor could spin up a server on any given domain, respond with a `sub` parameter according to the user they want to act as and use the resulting token to perform provisioning requests. Versions 8.1.2 and 9.0.1 contain a patch. As a workaround, disable the provisioning API.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_CONFIRM |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | matrix-appservice-bridge |
Affected:
>= 4.0.0, < 8.1.2
Affected: = 9.0.0 |
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CVE-2021-32659 (GCVE-0-2021-32659)
Vulnerability from nvd – Published: 2021-06-16 18:45 – Updated: 2024-08-03 23:25
VLAI
EPSS
VEX
Title
Automatic room upgrade handling can be used maliciously to bridge a room non-consentually
Summary
Matrix-appservice-bridge is the bridging service for the Matrix communication program's application services. In versions 2.6.0 and earlier, if a bridge has room upgrade handling turned on in the configuration (the `roomUpgradeOpts` key when instantiating a new `Bridge` instance.), any `m.room.tombstone` event it encounters will be used to unbridge the current room and bridge into the target room. However, the target room `m.room.create` event is not checked to verify if the `predecessor` field contains the previous room. This means that any malicious admin of a bridged room can repoint the traffic to a different room without the new room being aware. Versions 2.6.1 and greater are patched. As a workaround, disabling the automatic room upgrade handling can be done by removing the `roomUpgradeOpts` key from the `Bridge` class options.
Severity
6.5 (Medium)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_CONFIRM |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | matrix-appservice-bridge |
Affected:
< 2.6.1
|
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CVE-2023-38691 (GCVE-0-2023-38691)
Vulnerability from cvelistv5 – Published: 2023-08-04 16:34 – Updated: 2024-10-07 13:01
VLAI
EPSS
VEX
Title
matrix-appservice-bridge doesn't verify the sub parameter of an openId token exhange, allowing unauthorized access to provisioning APIs
Summary
matrix-appservice-bridge provides an API for setting up bridges. Starting in version 4.0.0 and prior to versions 8.1.2 and 9.0.1, a malicious Matrix server can use a foreign user's MXID in an OpenID exchange, allowing a bad actor to impersonate users when using the provisioning API. The library does not check that the servername part of the `sub` parameter (containing the user's *claimed* MXID) is the the same as the servername we are talking to. A malicious actor could spin up a server on any given domain, respond with a `sub` parameter according to the user they want to act as and use the resulting token to perform provisioning requests. Versions 8.1.2 and 9.0.1 contain a patch. As a workaround, disable the provisioning API.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_CONFIRM |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | matrix-appservice-bridge |
Affected:
>= 4.0.0, < 8.1.2
Affected: = 9.0.0 |
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CVE-2021-32659 (GCVE-0-2021-32659)
Vulnerability from cvelistv5 – Published: 2021-06-16 18:45 – Updated: 2024-08-03 23:25
VLAI
EPSS
VEX
Title
Automatic room upgrade handling can be used maliciously to bridge a room non-consentually
Summary
Matrix-appservice-bridge is the bridging service for the Matrix communication program's application services. In versions 2.6.0 and earlier, if a bridge has room upgrade handling turned on in the configuration (the `roomUpgradeOpts` key when instantiating a new `Bridge` instance.), any `m.room.tombstone` event it encounters will be used to unbridge the current room and bridge into the target room. However, the target room `m.room.create` event is not checked to verify if the `predecessor` field contains the previous room. This means that any malicious admin of a bridged room can repoint the traffic to a different room without the new room being aware. Versions 2.6.1 and greater are patched. As a workaround, disabling the automatic room upgrade handling can be done by removing the `roomUpgradeOpts` key from the `Bridge` class options.
Severity
6.5 (Medium)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_CONFIRM |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
| https://github.com/matrix-org/matrix-appservice-b… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | matrix-appservice-bridge |
Affected:
< 2.6.1
|
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