Wednesday, July 24, 2024

Security Researcher Breaks Google’s ReCaptcha v2 using Google’s Own Tool

Researcher Discover “A logic vulnerability” dubbed ReBreakCaptcha to bypassing Google’s reCAPTCHA fields which is using for prevent from robots and abusive scripts to access sites  by using google’s Speech Recognition API.

According to the Security Researcher , a bypass Technique called ReBreakCaptcha  which is used for bypass Google’s ReCaptcha v2 anywhere on the web.

The proof-of-concept code the researcher released allows attackers to automate the process of bypassing reCAPTCHA fields, currently used on millions of sites to keep out spam bots.

Researcher explained in East-Ee Security , ReBreakCaptcha works in three stages ,

  • Audio Challenge – Getting the correct challenge type.
  • Recognition – Converting the audio challenge audio and sending it to Google’s Speech Recognition API.
  • Verification – Verifying the Speech Recognition result and bypassing the ReCaptcha.

As per the Explantion give by the East-Ee Security , 3 Types of ReBreakCaptcha challenges has bee performed in this task .

Image Challenge

The challenge contains a description and an image which consists of 9 sub-images. The user is requested to select those sub-images that best match the given description.

Audio Challenge

The challenge contains an audio recording, The user is requested to enter the digits that are heard.

Now we have the audio challenge Recognition file and are ready to send it to Google Speech Recognition. How can this be done? Using their API.

“Before doing so, we will convert it to a ‘wav’ format which is requested by Google’s Speech Recognition PI.”

Text Challenge

The challenge contains a category and 5 candidate phrases. The user is requested to select those phrases which best match the given category.

The [verification] stage is fairly short.

“All we need to do now is to copy-paste the output string from Stage 2 into the text box and click ‘Verify’ on the ReCaptcha widget. That’s right, we now semi-automatically used Google’s Services to bypass another service of its own.”

ReBreakCaptcha vulnerability still unpatched by Google

East-EE has named this assault ReBreakCaptcha, and he says he found this weakness in 2016. Today, when he opened up to the Public about his research, he said the vulnerability was still unpatched .

 Researcher released allows attackers to automate the process of bypassing reCAPTCHA fields, currently used on millions of sites to keep out spam bots by proof-of-concept code  which is written by python and available in Github .

Also Read :


Latest articles

ShadowRoot Ransomware Attacking Organizations With Weaponized PDF Documents

A rudimentary ransomware targets Turkish businesses through phishing emails with ".ru" domain sender addresses....

BreachForumsV1 Database Leaked: Private messages, Emails & IP Exposed

BreachForumsV1, a notorious online platform for facilitating illegal activities, has reportedly suffered a massive...

250 Million Hamster Kombat Players Targeted Via Android And Windows Malware

Despite having simple gameplay, the new Telegram clicker game Hamster Kombat has become very...

Beware Of Malicious Python Packages That Steal Users Sensitive Data

Malicious Python packages uploaded by "dsfsdfds" to PyPI infiltrated user systems by exfiltrating sensitive...

Chinese Hackers Using Shared Framework To Create Multi-Platform Malware

Shared frameworks are often prone to hackers' abuses as they have been built into...

BlueStacks Emulator For Windows Flaw Exposes Millions Of Gamers To Attack

A significant vulnerability was discovered in BlueStacks, the world's fastest Android emulator and cloud...

Google Chrome 127 Released with a fix for 24 Security Vulnerabilities

Google has unveiled the latest version of its Chrome browser, Chrome 127, which is...
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles