• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

 | 

Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

 | 

Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

 | 

Unpatched flaw in EoL LG LNV5110R cameras lets hackers gain Admin access

 | 

Koske, a new AI-Generated Linux malware appears in the threat landscape

 | 

Mitel patches critical MiVoice MX-ONE Auth bypass flaw

 | 

Coyote malware is first-ever malware abusing Windows UI Automation

 | 

SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks

 | 

DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033

 | 

Stealth backdoor found in WordPress mu-Plugins folder

 | 

U.S. CISA adds CrushFTP, Google Chromium, and SysAid flaws to its Known Exploited Vulnerabilities catalog

 | 

U.S. CISA urges FCEB agencies to fix two Microsoft SharePoint flaws immediately and added them to its Known Exploited Vulnerabilities catalog

 | 

Sophos fixed two critical Sophos Firewall vulnerabilities

 | 

French Authorities confirm XSS.is admin arrested in Ukraine

 | 

Microsoft linked attacks on SharePoint flaws to China-nexus actors

 | 

Cisco confirms active exploitation of ISE and ISE-PIC flaws

 | 

SharePoint under fire: new ToolShell attacks target enterprises

 | 

CrushFTP zero-day actively exploited at least since July 18

 | 

Hardcoded credentials found in HPE Aruba Instant On Wi-Fi devices

 | 

MuddyWater deploys new DCHSpy variants amid Iran-Israel conflict

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Internet of Things
  • A security expert found a 0-Day flaw in NETGEAR WNR2000 Routers

A security expert found a 0-Day flaw in NETGEAR WNR2000 Routers

Pierluigi Paganini December 22, 2016

An expert found flaws in NETGEAR WNR2000 routers that could be remotely exploited by an attacker to take full control of the affected device.

The security expert Pedro Ribeiro discovered vulnerabilities in NETGEAR WNR2000 Routers, including a zero-day flaw, that could be exploited remotely to take full control of the device if remote administration is enabled.

Ribeiro has already discovered around 10,000 vulnerable devices with the remote admin enabled that are affected by an RCE flaw. According to the expert, the overall number of affected devices could be much greater.

The expert decided to publish the advisory and to release the exploit code because NETGEAR did not respond his emails.

The vulnerabilities were found in NETGEAR WNR2000v5, which doesn’t have remote administration enabled by default on the latest firmware. Remote attacks against WNR2000v5 routers would be possible if a user had manually enabled remote administration.

The expert explained that the NETGEAR WNR2000 router allows an administrator to perform sensitive actions by invoking the CGI apply.cgi URL on the web server on the device. The URL is exposed by the embedded web server uhttpd . While reverse engineering

Ribeiro reverse engineering the uhttpd discovered that another function, the apply_noauth.cgi, allows an unauthenticated user to perform sensitive actions on the device. It could be used to reboot the router or to reset factory settings.

Below the code to reboot the router:

====
POST /apply_noauth.cgi?/reboot_waiting.htm HTTP/1.1
Host: 192.168.1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 26

submit_flag=reboot&yes=Yes
====

NETGEAR WNR2000 Routers

The researcher also discovered that it is possible to invoke other functions (i.e. Changing Internet WLAN settings or retrieving the admin password) by sending a “timestamp” variable attached to the URL.

“Some of the functions, such as rebooting the router, can be exploited straight away by an unauthenticated attacker. Other functions, such as changing Internet, WLAN settings or retrieving the administrative password, require the attacker to send a “timestamp” variable attached to the URL. This timestamp is generated every time the target page is accessed and functions as a sort of anti-CSRF token.” states the advisory published by Ribeiro. “The timestamp generating function was reverse engineered and due to incorrect use of random number generation (details below) it is possible to identify the token in less than 1000 attempts with no other previous knowledge.”

The expert explained that it is easy for an attacker in the same LAN to obtain a root shell on the router by exploiting an information leakage vulnerability to recover the administrator password and then use it to enable telnet functionality in the router.

Finally, the researcher found a stack buffer overflow that could be exploited by an unauthenticated attacker to take full control over the device and execute code remotely. The exploitation of this flaw leverages the apply_noauth.cgi issue and the timestamp identifying attack.

“Finally, a stack buffer overflow was also discovered, which combined with the apply_noauth.cgi vulnerability and the timestamp identifying attack allows an unauthenticated attacker to take full control of the device and execute code remotely. This vulnerability allows the attacker to execute code in the LAN and in the WAN.” added Riberio.

Recently experts found NETGEAR R7000, R6400, and R8000 routers affected by a security flaw that could be exploited by hackers to gain root access on the device and remotely run code.

[adrotate banner=”9″]

Pierluigi Paganini

(Security Affairs – NETGEAR WNR2000, hacking)


facebook linkedin twitter

Hacking IoT Netgear Pierluigi Paganini Security Affairs. WNR2000 Routers

you might also like

Pierluigi Paganini July 26, 2025
Law enforcement operations seized BlackSuit ransomware gang’s darknet sites
Read more
Pierluigi Paganini July 26, 2025
Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    Law enforcement operations seized BlackSuit ransomware gang’s darknet sites

    Cyber Crime / July 26, 2025

    Arizona woman sentenced for aiding North Korea in U.S. IT job fraud scheme

    Intelligence / July 26, 2025

    Operation CargoTalon targets Russia’s aerospace with EAGLET malware,

    Intelligence / July 25, 2025

    Unpatched flaw in EoL LG LNV5110R cameras lets hackers gain Admin access

    Security / July 25, 2025

    Koske, a new AI-Generated Linux malware appears in the threat landscape

    Malware / July 25, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT