Dahua Suffers Second Major Vulnerability, Silent [Finally Acknowledges]

By: Brian Karas, Published on Jul 25, 2017

Less than 3 months ago, Dahua received DHS ICS-CERT's worst score of 10.0 for their backdoor.

Now, Dahua has received another 10.0 score for a new vulnerability. Despite that, Dahua has remained silent.

In this note, we examine the vulnerability, Dahua's poor handling of this, compared to competitors Axis and Hikvision, and the potential impact to Dahua.

[Update: After the publication of our report, Dahua has finally acknowledged the vulnerability]

**** **** * ****** ago,***** ******** *** ***-****'* worst ***** ** **.**** ***** ********.

***, ***** *** ******** another **.* ***** *** a *** *************. ******* that, ***** *** ******** silent.

** **** ****, ** examine *** *************, *****'* poor ******** ** ****, compared ** *********** **** and *********, *** *** potential ****** ** *****.

[******: ***** *** *********** of *** ******, ***** has ******* ************ *** vulnerability]

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

Vulnerability ********

*****'* *** ********* ** vulnerable ** ***** ****** overflow, ********* ** ****, sponsored ** *** ** DHS. ************, *** ***** field *** *** ***** password, ** *** **** first **** *** *** when ********** ** *** camera, **** *** ******** input **** ******. **** can ** **** ** an ******** ** ****** excessively **** **** ** the ******** *****, *** trigger * ****** ******** in *** ****** **** that ********* *** *****.

****** ********* *** ** exploited ** ***** ** attacker ** ******* *** device, **** **** ******, or ********* ********** *** unit. ******* **** ************* exists ** *** ***** page ******, ** ************** is ******** ** ******* it, *** *** ****** with ****** ****** ** at **** ** *******.

*** ****** **** **** Dahua *** ******** ****** 2 ****** ***, ** the *** ** ***.

Models ********

***** ***** ** ****** that *** ******** *** that ***** *** ******** a ******** ***, *********:

*******, ** ** *** clear *** **** ***** models *** ********. *** example,***** **** **********, **** ****** *****, in ******* *******, **** North *******, **** ******* are ******* *** *** same *********** ********. ********, as *** ***** **** the ***** ********, ***** Dahua ****** **** ****** various *****, **** ***** models ***** ** ********.

No ********** / ** ******

***** *** **** ** official ********** *** ****** of **** **********, ***** is ******** ** ***** matters ** ** ******* below *** *****'* ***********.

**** *** ******* *** to ******** ******** ** Dahua *** *** ******** no **-***-****** ******** ***** this ****** *************

Fix **********

*** *** **** ************* report ******** * **** to ******** ** *****'* international **** **** ***** fix *** *************. *** that ****, *** **** of *****'* ************* ***** are ****, ********* *** errors:

******: ***** ** *****, the **** / ***** are *** ******.******** ******** ** *** the ************* ****.

*****'* ***** ******* ******* is **********, *** *** no ********* ** **** vulnerability, *** **** ************* update ***** **** ***** 2017:

**** *** ******** ************* notices **** **********, ** it **** ****** ** models ******* ***** ***** far **** ****** ********.

Researcher **********

*** **** ******* *********** *****, ** ***** ******** firm******** ************, *** **** ******** (no ****/*********** *****) **** the ********* ** *** vulnerability. ******** ************ ******* to ******* ********** ******* of *** *************.

Violates ******** *********

*** **********, **** ** how **** *** ********* have ******* ***************:

*********'* ******* ************** ***** ********** ***** most ****** *************, *** links ** ******** *******:

**** ******** ******* ** known ***************, *** ***** to ********, ** ************ ************:

**** ** ***** ******** to *****'* **** ** acknowledgement, **** ** ********, and ** *** **** of **** ***********, **** of **** ********** ********.

******

*** ******* ** **** Dahua ********* ** **** an ********* **** ***** record, **** **** ******* vulnerabilities *** **** ******* to ******** ****** *** inform ***** *********. ** that ***, ** ** not *** **** ********* Dahua **** *****, ** some *****, **** ** business ** ***** *** Dahua. *******, ** **** show *** ********* ** unwilling ***** ** ** acknowledge *************** **********, *** deliver ******** **** ********* can *****.

Vote / ****

******

****** **** ****:***** *** *** ****** a ***** ********* *** ******* ************* the *************, ****** ** only ******* * ** their ****** *** **** a ******** ******* ** not *** *********:

***** *** ******** ** dated **** *** **** and ****, **** *** not **** ** ***** website ***** *** ****. The ************* *** ****** publicly ** **** **** 18th *** *** **** report **** ***** *** notified ** *** **.

***** ** ***** ** document ** ****** ** the ***** ************* ******* press ******* ** ***** security *******.

Comments (34)

John Honovich

IPVM | 07/25/17 01:29pm

***** ** *** **** obvious **** *** ******** people ** *** ****** that ***** ** **.

**** ** * ******* that ****** ~$* ******* in ****** *******, **,*** or ** ********* *** repeatedly ***** ** ** even *** ****** *****.

***** ****** **** *** Chinese ****** ******* ***** up ******* **** ****** lack *** *********** ********** to ******* ******* **.

Undisclosed Integrator #1

07/25/17 01:30pm

* ***** *** ******* ******* ** **** *** *** ******** poor ** ** *** ********** ******** ********.

* ***** *** **** ***** ** ** - **** ** you ***** ** ***** ******** *** ********?

Undisclosed Distributor #3

In reply to Undisclosed Integrator #1 | 07/25/17 02:16pm

******: "**** ** *** ***** **the ******* ** Dahua security and response?".

Shannon Davis

TED Systems | 07/25/17 01:40pm

***'* **** ** ***** are ****** ***** ** be *************** ***** ** IP ******* *** ** devices. **** ** *** nature ** * ******** which ******* *** *** too **** ****** *** there **** ** **** these *** ***** *********** harm. ******* *** *************** are ********** ** *** manufacturer ** * ***** hat ****** *** **** to **** ********** ** safe ** ********. *** real ******** *** *** integrity ** * ************, and * ***'* **** which *** ******, ** how **** ****** *** situation *** *** **** they ****** *** *********. Manufacturers **** ** **** facts *** ***** **** their ** ** ***** and ******* *** ********** take **** ** *** issue. ** ** **** is **** ********* ******** want-to-be ********* *** ****** great *********, ** ******* or ******** ** ****** manufacturer. * ***** ********* the ****** **** ** these ********* ***'* **** to ******* ******* *** effectively ** *** ** the **** **** ****'* discover *** ************* ********** and ***'* **** ***** they ****'* ** **** thorough ******* *** **** then *** **** ***** find *** ***************. ***'* face ** *** **** mistakes *********, ** ** how *** *** **** mistake **** ***** *** who *** ***.

John Honovich

IPVM | In reply to Shannon Davis | 07/25/17 01:45pm

*******, * ***** **** you ***** *** ********** of ********** "******* *** **********".

*******, * **** ***** that *************** ****** ** evaluated ***** ** *** fundamental *** **** **** are ** *******. **** Dahua, **** ** * big **** ** *** issue. ***** ****** *************** tend ** ** ***** issues **** ******* ****** skill ** *******. **** makes **** **** ********* as **** ** ****** to **** *********** ******** with *****'* ******** **** vulnerabilities **** *** ******* or ******* ** **** advantage **.

Avatar

Brian Hampton

IPVMU Certified | In reply to John Honovich | 07/26/17 05:21pm

****** ***** *** ** experienced *********. * ********* to ***** ***** *** previous ******** *** *** what * ***** ** to *** ** ** some ***** ******** * had *** * *** completely ******* ** *** I *** ******** ** do **. ** ***** the ****** ***** ****** it ***'* ********* **** could ** ****** ***** advantage ** ** **** average ******** ****.

John Honovich

IPVM | In reply to Brian Hampton | 07/27/17 12:20am

* ********* ** ***** about *** ******** ******** and *** **** * could ** ** *** in ** **** ***** products * *** *** I *** ********** ******* at *** * *** supposed ** ** **.

*****,**** ** *** ****** to *** / ******* the ***** ********. **'* ****** ** Github *** **'* ***** straight ******* ** ***. It's *** **** *** we **** ** *********** on ******** ******** ****.

** ***'* ********* **** could ** ****** ***** advantage ** ** **** average ******** ****

*** ******* *********, ** even ****** ******, ***** there *** ******* ******** worldwide, ***** ****** **** advantage ** **.

Randy Lines

In reply to Shannon Davis | 07/26/17 04:06pm

***** ********. ******** ************** on ***** ** * very ***** ******* ** 2016 :(

***

Undisclosed Manufacturer #2

07/25/17 01:51pm

** **** ******** **** * **** **** ******* ** **** this ** ******* ** ***** **** *** ****** ***** *******, when ** ***** **** *** ***** ** ***** ** *** last **** *** * ****.

Avatar

Brian Karas

IPVM | In reply to Undisclosed Manufacturer #2 | 07/25/17 02:08pm

**** ** *****'* ****** vulnerability **** * **.* CERT *****, *** **** the ****** *** **** year. *** ******** ***, the***** *********** *********** **** ********, as ** *** ********** easy ** *******, ******** a ***** ****** ** devices, *** **** ******** sensitive **** (*********).

**** ******* ******** ********** Dahua ***************, ***** ** **** update ** *********** ******* *********** ****.

Undisclosed #4

In reply to Brian Karas | 07/27/17 09:14am

...*** ***** ***** *** the ***** ********, ** the **** ***** **** you *** **** ********** to *** ******, **** not ******** ***** **** length...

**** ** *****'* ****** vulnerability **** * **.* CERT *****, *** **** the ****** *** **** year. *** ******** ***, the ***** ********...

**** **** *** **** be *** ***** *********...

John Honovich

IPVM | 07/25/17 04:00pm

*****'* ****** ************* ****, including *** ******** *** link, *** **** **** at ***** * ***** now.

*** *** **** ***** the ****** ** ** but ******* ** *** been ************* ** ****** such **** ** ****** find / ****** *** pages.

********** **** **** *** it *** ** ** hard ** ********** *** a ******** ****** ********** company ***** **** **** issues.

John Honovich

IPVM | In reply to John Honovich | 07/26/17 12:32am

******: ***** (** *****) 13 *****, *** **** / ***** *** *** active.******** ******** ** *** the ************* ****.

Undisclosed #4

07/25/17 04:25pm

****** ** ******* ****** and ****** ******** ;)

Undisclosed Manufacturer #8

In reply to Undisclosed #4 | 07/27/17 03:36am

******. **'** ***** ******* better *** *** ********. Joy ******!

Undisclosed Manufacturer #8

In reply to Undisclosed Manufacturer #8 | 07/27/17 03:38am

**** ********** - *'* not ******** * ****** employee...

Robert Shih

IPVM | 07/25/17 06:29pm

** ***** ********** *** firmwares ** ********, ** this ** ***** ******* this *** ** **** isolated ** **** ******** chipset ******. *'** *** what **** * *** dig ** ** ** off ****.

****, ** **** ** Sonia ******* ** *** bulletin *******, **** ** not ****** *** *** interface (***** ** ******* in * ********* ********** of *** ********)...

Undisclosed Integrator #5

In reply to Robert Shih | 07/25/17 10:21pm

*** **** *********** **** ********** *** ******** ******?

Robert Shih

IPVM | In reply to Undisclosed Integrator #5 | 07/25/17 10:26pm

***** ** *** ** the *********, **** *** IPCs **** *'** ****. Not * ************ ***** file ** **'* *** the **** ******* ****** all ** ****.

****, **** ******** ******* only ******* ** ******** cams...which *'** **** **** 2-3 ** ** * whole ****? *****'* **** like **'** ****** *** many ******** *******...** ***

Undisclosed End User #6

07/26/17 05:32am

**** *** ******* ** code ******* ********* *** Sonia, * ***** *** be ********* ** *** flaw ***** ** ****. I ***** *** **** way ** **** *** if **** ** *** case, ** ** *** into ******* *** ** exploit *** ** *****, or **** ** *** on ********* ** ******* and *** ** ****** from *****. ******** **** that *** *********** **** provide **** ******** ************* list ** *** ****** than ***** ******.

John Honovich

IPVM | In reply to Undisclosed End User #6 | 07/26/17 11:21am

**** *** ******* ** code ******* ********* *** Sonia

#*, ******. *** *** elaborate ** **** '*********' and '*****' *** *** how **** ****** / differ?

Undisclosed End User #6

In reply to John Honovich | 07/26/17 05:13pm

**,

********* *** ***** ** the *** **** ******** into *****'* *******, ***** the ********** ** **** (more ** ****) *** naming ** *** ******** itself, ********* **** "*******" they **** **** ******* and ******** ***.

**** **** ****** ** handle *** ******, ****/***** server, *****, ****, ***** console... ***, ** ***** - **'* *** *** binary **** ****** ****** everything ********* ********** ******** and ********.

*** *********** ***** **, when **** *** ***** same ****** **** *** are ******** *** ********* "chipset" ** ************ (***/****... or ********), *************** ***** in *** ************/******* *** most ****** ** ***** in *** ****** ** well (*'**).

**** ** *** **** with ******** ********, ** ********* * would *** ** ********* that **** **** ***** in **** ********* *** Sonia, *** ** ************ exploited *** **** ****** root (** *** *********/***** binaries **** ** ****).

*******, ***** ***** ** a ********** ** *** used **** *** ******** - ***** *** **** lays *****, *** ***** exist ***** ********* *) base64, *) ***** ***** hash *** *) ***, and ** ***** ****** only ***** ** ******** who ******* "***", *** that ***** ****** **** the ********** *******.

******, **** ***** **** a *** ** **** the "*****" ******.

~ # ** ** | **** *****
*** **** ***:** /***/***/***** AEWB
*** **** *:** **** sonia
~ #

~ # ******* -*** | **** *****
*** * * *.*.*.*:***** 0.0.0.0:* ****** ***/*****
*** * * ***.*.*.*:**** 0.0.0.0:* ****** ***/*****
*** * * ***.*.*.*:**** 0.0.0.0:* ****** ***/*****
*** * * *.*.*.*:**** 0.0.0.0:* ****** ***/*****
*** * * :::*** :::* ****** ***/*****
*** * * :::** :::* ****** ***/*****
*** * * :::***** :::* ****** ***/*****
*** * * :::***** :::* ****** ***/*****
*** * * :::*** :::* ****** ***/*****
*** * * *.*.*.*:***** 0.0.0.0:* ***/*****
*** * * *.*.*.*:***** 0.0.0.0:* ***/*****
*** * * ***.***.***.***:**** 0.0.0.0:* ***/*****
*** * * *.*.*.*:**** 0.0.0.0:* ***/*****
*** * * *.*.*.*:***** 0.0.0.0:* ***/*****
*** * * *.*.*.*:***** 0.0.0.0:* ***/*****
*** * * ***.***.*.**:***** 0.0.0.0:* ***/*****
*** * * ***.***.***.***:***** 0.0.0.0:* ***/*****
*** * * *.*.*.*:***** 0.0.0.0:* ***/*****
*** * * ***.***.*.**:**** 0.0.0.0:* ***/*****
*** * * ***.***.***.***:**** 0.0.0.0:* ***/*****
*** * * *.*.*.*:**** 0.0.0.0:* ***/*****
*** * * *.*.*.*:**** 0.0.0.0:* ***/*****
*** * * ***.***.***.***:***** 0.0.0.0:* ***/*****
**** * [ ] DGRAM *** ***/***** /***/***/**************-******
**** * [ ] DGRAM ***** ***/***** /***/***/************-*

John Honovich

IPVM | In reply to Undisclosed End User #6 | 07/26/17 05:52pm

******! **** *******.

***, ******** *******, ** The ******** ****************:

***** (*** *****) *** Sofia (*** ******/********) ** just *** **** ** a ****** **** **** provides **** *** *** and *** ***/*********** ********* to *** ***/***/***.

**** **** **** *********** of *****. ** *** think ***** ** * Sofia ***** ** ******* For ********? *** *** sense ** **** *** sharing **** **?

Undisclosed End User #6

In reply to John Honovich | 07/26/17 06:16pm

**** ***********, ***** **** well ** ** **** Challenge, ***** *** ***** share **** ****.

*** *** ** *** comments ***** ** "*** Register" ********* *********, *** - **** **** ** have *** ****** **** provides **** ******** (***** davinci), *** ** ******** of **** ***** *********/***** and ********* *******, * have *** ***** **** davinci ***** **** **** as *********/***** - *** Rapid7 *** ***** **** of ***** **** ********* some **** ***, ** maybe **** **** ** the **** ******* **** did (*********** ***, ** I **** *** ***** to *** *** *** binary *** ******** *** Hardware ******* - *** also ***).

*** **** ** ****** from * ********* ***.

# # ******* -***
****** ******** *********** (******* and ***********)
***** ****-* ****-* ***** Address ******* ******* ***** PID/Program ****
*** * * *.*.*.*:** 0.0.0.0:* ****** ***/********
*** * * ***.*.*.*:***** 0.0.0.0:* ****** ****/********
*** * *** ***.***.*.**:** 192.168.5.120:52896 *********** ****/********
*** * * :::**** :::* ****** ***/*******
*** * * :::*** :::* ****** ***/*******
*** * * :::** :::* ****** ***/*******
*** * * :::** :::* ****** ***/********
*** * * ::*:***** :::* ****** ****/********
*** * * :::*** :::* ****** ***/*******
*** * * *.*.*.*:***** 0.0.0.0:* ***/*******
*** * * *.*.*.*:**** 0.0.0.0:* ***/*******
*** * * *.*.*.*:***** 0.0.0.0:* ***/*******
*** * * *.*.*.*:**** 0.0.0.0:* ***/*******
*** * * *.*.*.*:**** 0.0.0.0:* ***/*******
*** * * :::*** :::* ***/*******
*** * * :::**** :::* ***/*******
*** * * :::***** :::* ***/*******
*** * * :::**** :::* ***/*******
*** * * :::***** :::* ***/*******
*** ***** * :::** :::* ** ***/*******

Kenny Johnson

07/26/17 01:20pm

** * ****** **** not **** *** **** port ********* ** **** then ** ** **** from **** *************. *****?

****, **** **** ******* cameras *****? *** ****.

Avatar

Brian Karas

IPVM | In reply to Kenny Johnson | 07/26/17 01:45pm

** * ****** **** not **** *** **** port ********* ** **** then ** ** **** from **** *************. *****?

***, ** ***** ** no ****** ****** ** the *** ********* ** any **** **** *** should ** **** **** this ************* ***** ******** executed.

****, **** **** ******* cameras *****? *** ****.

Undisclosed Manufacturer #7

07/26/17 06:09pm

**** **** ****** ******* that **** * ***** vulnerability ** **** ******* can ***** ** ** issue. ** ** ******** gains ****** **** ******* source, **** **** *** use **** ************* ** gain ****** ** *** video, **** *******, ***.

***, ** ***'* ** critical ** **** ******* are ******** ******** **********, but *** *******'* **** ignore **.

Avatar

Heikki Peltomäki

07/27/17 12:02am

**'* *** ******** ** all ** **** ******** issues. *** **** *** sit ** *** ****** old *********** *** ***'* give * **** ******* to **** *********... **** that ** **** ***** disrespecting. **** **** ***** one ******, **** **** has ***** **** **** its *********. ***** ***, like ****, **** *** their ****** ** ***** vulnerability ** * ***** period ** ****.

**** ******* * ***, just ******* ***** *** exploit ***** **** ********* make ***** ******* **** secure, ** ***** ****** them * ******.

******* * ***** *** on ********* ********** *****'* make ** ** ****.

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

John Honovich

IPVM | 07/27/17 12:08am

******:***** *** *** ****** a ***** ********* *** ******* ************* the *************, ****** ** only ******* * ** their ****** *** **** a ******** ******* ** not *** *********:

***** *** ******** ** dated **** *** **** and ****, **** *** not **** ** ***** website ***** *** ****.

***** ** ***** ** document ** ****** ** the ***** ************* ******* press ******* ** ***** security *******.

Robert Shih

IPVM | In reply to John Honovich | 07/27/17 06:57pm

* ***** ****'* **** listing *** ******** ******** US ******* ******. *** only ****** *** ******** isn't "*********" ** ******** because **** ****'* ******* an **** ******* **** yet.

*** ****** ****** ** the ***** ********* *** for ***** ********/************* **** and **** **** *** PAL ******** (******* **** the ******* *** ********* in ** **********).

Avatar

Brian Karas

IPVM | In reply to Robert Shih | 07/27/17 07:00pm

*** **** ****** *** firmware ***'* "*********" ** probably ******* **** ****'* compile ** **** ******* copy ***.

*********** **** ************* *** now **** ****** *** 10 ****, ***** ****** have *** *** **** version ********* ** *** same ****, ** ****** a ***, ** *** PAL *******.

Undisclosed End User #6

In reply to Brian Karas | 07/27/17 07:08pm

***, **** *** **** ***** *** ****, **?

*** **'* **** ****... **********!

Undisclosed Integrator #9

07/27/17 07:04pm

**, ** ** ***** *** * "*******" ******** ********... *** many ****** ***** ** **** ** **** ***** ** *** of ***** ****** ********* ** ***** *** *** ********???

***** *** ****** *** ********?

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

Undisclosed End User #6

07/27/17 07:04pm

***** ****** * ****** ***** *** ******** **** ** ************* series **** *****, ** * ********** **** *** ***** ***** was *** **** ****** ************* ** ******** ************ ***** ******************.

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