A vulnerability has been found in Trapeze TransitMaster (the affected version is unknown) and classified as problematic. This vulnerability affects an unknown code of the file ManageSubscriber.aspx/GetSubscriber. The manipulation of the argument userID as part of a JSON Data leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Trapeze TransitMaster is vulnerable to information disclosure (emails / hashed passwords) via a modified userID field in JSON data to ManageSubscriber.aspx/GetSubscriber. NOTE: this software is independently deployed at multiple municipal transit systems; it is not found exclusively on the "webwatch.(REDACTED).com" server mentioned in the reference.

The bug was discovered 09/29/2017. The weakness was presented 10/10/2017 (Website). The advisory is shared for download at raw.githubusercontent.com. This vulnerability was named CVE-2017-14943 since 09/29/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k.

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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• Trapeze

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• TransitMaster

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