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osvGoogleOSV:CVE-2021-29431
HistoryApr 15, 2021 - 9:15 p.m.

CVE-2021-29431

2021-04-1521:15:17
Google
osv.dev
3
sydent
vulnerability
internal access
http
firewall

EPSS

0.001

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.

EPSS

0.001

Percentile

42.3%