TVT Backdoor Disclosed

Author: IPVM Team, Published on Apr 09, 2018

Security researcher Bashis has disclosed a backdoor in TVT video surveillance products, with TVT issuing its own 'Notification of Critical Vulnerabilities'. Bashis has found numerous vulnerabilities in video surveillance products, most notably the 2017 Dahua backdoor, which later resulted in the industry's most widespread hacking attack.

In this note, we examine the TVT backdoor and TVT's response.

******** **************** *** ********* * ******** ** *** ***** ************ ********, **** *** ******* *** *** '************ ** ******** ***************'.****** *** ***** ******** *************** ** ***** ************ ********, **** ********** **** ***** ********, ***** ***** ******** ** ***********'* **** ********** ******* ******.

** **** ****, ** ******* *** *** ******** *** ***'* response.

[***************]

*******

****** ******** **** ***************:

**** *******:

********* ************** ** ******** ****** ****** ************* - ********* ***** and ******** ** ***** ****.

*** ******* ** ******** ****** *** ****'* ******** *** ********* take ******* ** *** ****** ** ********** **********.

** **** ** ********* ********:

***** **** ************* ******* **** ****** ** '****** ******', ** Bashis ****** *** ********* ****** *** *** ****.

Fix *********

*** **** **** ***** ** * *** *********:

*** *** ******** *** ******** **** *** *******, ** ** to *** ********* ******* ** *** ***** ******* ********* ******* to *** *** ***** ********.

*** ******* ** *** ********* ** *** **** *** **** fix.

Impact ** ****

*** ** ********* ** *** *** ********* ** ********** / ******** (*** **** **** ** **). ** **** ****** ********* **** ****, ** ** ********* to ** ******* ***** ****** ** ***** ****** *** ********. Moreover, ** *** *** **** ********* **** **** **** **** immediately ** **** ** *** **** ****** *** ****.

TVT - ~$** ******* *****

*** ** * ******** ****** ********* *** ******** ***** ********, ** *% ** *****'* ****. The *******'* **** ******* ** ~$** ******* *** ** *** a ****** ************** ** ~$*** *******.

*** ***** ************ *********, *** ** ***-****, ******* ** ******* to ********* ** ********* *** */**** ** ** *** **** of ***** *** */** ** ** *** **** ** *********.

TVT's *******

*****'* ************, **** *** *** ************ ******* ******* ** ********* *** problems:

******* ** ******** ****** ******* ****** *** *************, ** ****** how *** ** *** *** ** *** ****** **** ***, which ****** *** ** ** ** ** ******** ** ******* our ******* *** *******.

** ******, **** ****** *** *** ***** **** ******, **** as ****-***** ********* *** *********** ********* ** ***** ****.

**** **** ***** **** '*****' ***** ***************:

** ******** ***** * *************** **** * ***** **** **** 3******* ******** ******.

*** ********* ****** *** ********* *** ****** ****** *** ** realize **** ** ***** *** ****-***** ********* ** ***'* *** code, **** ***** *** **** ** '****' **** ***** **** put **** ** *****. ********, *** **** '*****' **** ***** Bashis ******** ** *** **** **** ** **** ****** *** public **********.

Comments (17)

*** ***** *** ******* ** **** *** ******, ********* *** "TVT ****" ******* ~**** *********.

********** "****://**.***.**.**:****/***/********/*****/************.***" ***** *** *** ******** ***** **** *** ***** page *** ** ***** **** ** *** *****.

*** ****** **** ****** '********:' ***** **** **** >****

**

******. * *** **** **** ** ** **** ***** ******* around ** *** **** ** **** ****** ** ****** ******. Will ** **** ************* *****.

...** *** **** ** **** ****** ** ****** ******.

*. **/****-**** *** *** **-****** ******

*. *** ******* ********** ****** + ******** *****

*. ****** ********* ********** *** ******

*. **** * **** ******.

********** *******.

********* ******* ** ** **** *** ********** ** **** *** plane.

******* ***

** **** * **** *****? ***, *********** ** *** * ********** *******:

** ********** *** ****** **** **** **** *** **** ** a ********** *** ******** ****** *****, **** **** **** ******* NVRs. * **** ****** **** ***** ******** *** *****, *** never ***** ***** **** ** *** ******* ** *** ******* I **** **** ******** ** **************.

***, *********** ** *** * ********** *******:

******* ***** **-*** **** ***** ************ *********.

**** **** **** *** *** ***** ** *** *** ****** (not ******* **** ****** ******** ** ******) ** ** ************* just ** ******** *** ****-***** ******** ** *** ***** **** of *** *** *********?

*******

**** *** ***** **** ***** ** **** ***/***** **** *****, or ** **** ***** *** ******** ****?

****'* *** ** **** *********** ** ****** ****

*** **** ******* ** ** *******, ****, ** ****...** *** of *** *****?

***** **'* ***** ***** *******, **?

***:****://**.***.***.**/****/***.****

***** **’* ***** ***** *******, **?

***** *** *****, ***** ‘*********’ *** **** ******* *****?

*** ** *** ******* ** *** ********* **** ** ******** properly ** ** ** ** *** ***** ********. *** ****** upgrading ****** **** ** *** ***, ***we ****** **** ********* ** **** ** ******* *** ** ********* ** ***** *******.

****, *** *** ****** ***** ****...

"** ******** ***** * *************** **** * ***** **** **** 3******* ******** ******. * ** **** *** ****** ****** *** firmware, *** *** ** **** ** ******* *** *******, ** even ****** *** **** ** ******* ** ************ ****-*** ** there. ** ********* *** *** * ****** ** ******** ** proper *** ** ***** *** *************, ** ***** ** ***** the ******** **** ** *** ******."

* ***** **** *** ** **** ********* ** *******, *********** as **** *** ** ***** *** ****** ********.

* *** **************, ***** ***** ****** ** **** ***** ****!

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