GitHub_MCVE-2021-29431CVE-2021-29431
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
42.3%
Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.
Affected configurations
CNA Affected
[
{
"product": "sydent",
"vendor": "matrix-org",
"versions": [
{
"status": "affected",
"version": "< 2.3.0"
}
]
}
]References
github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a
github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3
github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a
github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f
github.com/matrix-org/sydent/releases/tag/v2.3.0
github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4
pypi.org/project/matrix-sydent/
Social References
More
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
42.3%