CVE-2021-29431

Description

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.

Risk Information

Base Score

6.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Score

Exploitation Probability

0.303

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-29430,CVE-2021-29431,CVE-2021-29432,CVE-2021-29433 are fixed in Python-matrix-sydent 2.3.0	Windows
Vulnerabilities CVE-2021-29430,CVE-2021-29431,CVE-2021-29432,CVE-2021-29433 are fixed in Python-matrix-sydent for linux 2.3.0	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234