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Vulnerability of Technicolor Thomson TWG850-4: bypassing authentication

Synthesis of the vulnerability 

An unauthenticated attacker can perform administration tasks on the Technicolor Thomson TWG850-4 modem.
Vulnerable products: SpeedTouch.
Severity of this weakness: 2/4.
Creation date: 21/09/2012.
Références of this bulletin: BID-55621, VIGILANCE-VUL-11964.

Description of the vulnerability 

The Technicolor Thomson TWG850-4 modem can be administered via a web interface:
  http://s/goform/RgSecurity : reset password
  http://s/goform/RgSetup : change configuration
  http://s/goform/RgUrlBlock : block an url

However, access to these pages can be done directly, skipping the authentication phase.

An unauthenticated attacker can therefore perform administration tasks on the Technicolor Thomson TWG850-4 modem.
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This cybersecurity weakness impacts software or systems such as SpeedTouch.

Our Vigil@nce team determined that the severity of this security vulnerability is medium.

The trust level is of type unique source, with an origin of intranet client.

An attacker with a expert ability can exploit this vulnerability bulletin.

Solutions for this threat 

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