Multiple cross-site request forgery (CSRF) vulnerabilities in Huawei HiLink E3236 before E3276sTCPU-V200R002B470D13SP00C00 and E3276sWebUI-V100R007B100D03SP01C03 and E3276 before E3236sTCPU-V200R002B146D41SP00C00 and E3236sWebUI-V100R007B100D03SP01C03 allow remote attackers to hijack the authentication of administrators for requests that (1) change configuration settings or (2) use device functions.
Weakness
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
Affected Software
| Name |
Vendor |
Start Version |
End Version |
| E3236_firmware |
Huawei |
e3236s-2tcpu-22.146.29.00.00 (including) |
e3236s-2tcpu-22.146.29.00.00 (including) |
| E3236_firmware |
Huawei |
webui-13.100.10.00.03 (including) |
webui-13.100.10.00.03 (including) |
| E3276_firmware |
Huawei |
e3276s-150tcpu-22.265.03.00.00 (including) |
e3276s-150tcpu-22.265.03.00.00 (including) |
| E3276_firmware |
Huawei |
webui-13.100.09.00.03 (including) |
webui-13.100.09.00.03 (including) |
Potential Mitigations
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
- Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
- Use the “double-submitted cookie” method as described by Felten and Zeller:
- When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
- Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
- This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]
References