Vulnerability Note VU#360431
Chiyu Technology fingerprint access control contains multiple vulnerabilities
Original Release date: 31 Jul 2015 | Last revised: 31 Jul 2015

Overview
Multiple models of Chiyu Technology fingerprint access control devices contain a cross-site scripting (XSS) vulnerability and an authentication bypass vulnerability.

Description
CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) – CVE-2015-2870
According to the reporter, <script> tags are not filtered out of a URL passed to the device, allowing an attacker to perform a reflected XSS attack.

CWE-288: Authentication Bypass Using an Alternate Path or Channel – CVE-2015-2871

According to the reporter, an attacker can view and modify the existing configuration of the device without authentication by directly accessing known paths. The path varies slightly depending on model and services available.

Model BF-660C:

http://<host>/net.htm – Communication settings

Model BF-630, BF-630W:

http://<host>/voice.htm – Voice Time Set
http://<host>/bf.htm – UniFinger Setup

The reporter has identified models BF-660C, BF-630, BF-630W as being vulnerable; other models may also be vulnerable.

The CERT/CC has been unable to verify this information with the vendor.

The CVSS score below is based on CVE-2015-2871.

Impact
An unauthenticated remote attacker may be able to view or modify device configuration, or obtain user credentials.

Solution
The CERT/CC is currently unaware of a practical solution to this problem.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate UpdatedChiyu TechnologiesAffected03 Jun 201507 Jul 2015If you are a vendor and your product is affected, let
us know.

CVSS Metrics (Learn More)

Group
Score
Vector

Base
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal
6.4
E:POC/RL:U/RC:UR

Environmental
4.8
CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

http://cwe.mitre.org/data/definitions/80.html
http://cwe.mitre.org/data/definitions/288.html

Credit

Thanks to Maxim Rupp for reporting this vulnerability to us.
This document was written by Garret Wassermann.

Other Information

CVE IDs:
CVE-2015-2870
CVE-2015-2871

Date Public:
31 Jul 2015

Date First Published:
31 Jul 2015

Date Last Updated:
31 Jul 2015

Document Revision:
28

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