New CSRF and XSS vulnerabilities in ADSL modem Callisto 821+
I want to warn you about security vulnerabilities in ADSL modem
Callisto 821+ (SI2000 Callisto821+ Router).
These are Cross-Site Request Forgery and Cross-Site Scripting
vulnerabilities. In April I've already drew attention of Ukrtelecom's
representative (and this modem was bough at Ukrtelecom) about
multiple vulnerabilities in this model of Callisto modems (and other
models also could be affected).
These attacks should be conducted on modem owner, which is logged
into control panel. Taking into account that it's unlikely to catch
him in this state, then it's possible to use before-mentioned
vulnerabilities (http://websecurity.com.ua/5161/) for conducting of
remote login (for logining him into control panel). After that it's
possible to conduct CSRF or XSS attack.
This vulnerability allows to delete DNS server in modem's settings
(item0 and item1 - it's dynamic DNS, item2 and higher - it's static
Vulnerable is the next model: SI2000 Callisto821+ Router: X7821
Annex A v188.8.131.52 / Argon 4x1 CSP v1.0 (ISOS 9.0) [4.3.4-5.1]. This
model with other firmware and also other models of Callisto also must