A vulnerability was found in LightOpenID up to 1.3.1. It has been declared as critical. Affected by this vulnerability is an unknown function of the file openid.php. The manipulation as part of a Request leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.

The bug was discovered 04/09/2019. The weakness was published 05/10/2019. This vulnerability is known as CVE-2019-11066 since 04/09/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 31 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:openid.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• LightOpenID

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• 1.3.0
• 1.3.1

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