Monday, April 15, 2024

unCaptcha to Break reCaptcha System of Defense in 5.42 Seconds

Captcha challenge is the first line of defense to protect the website against attacks, it challenges to prove that you are the human user.

Google’s ReCaptcha was introduced in 2014 and it is used by the significant number of users and it relies on advanced risk analysis engine and it offers audio and image captcha, here security researchers took audio captcha to attack.

Security researchers from UM present unCaptcha, a low-resource, fully automated attack on Google’s 2017 reCaptcha audio captcha with a high success rate.

We have evaluated unCaptcha using over 450 reCaptcha challenges from live websites, and showed that it can solve them with 85.15% accuracy in 5.42 seconds, on average: less time than it takes to even play the audio challenge! Researchers said.

To attack captcha one should have huge resources but anyway the success rate is very less.Here they provided a low resource attack with a high success rate.

Also Read Beware: Mass Ransomware Cyber Attack with “Bad Rabbit” Ransomware Hitting Many Government & Private organization

How unCaptcha works – Captcha

It is completely automated, they obtain audio samples and separated into segments for sound bites analysis and uploads to online speech recognization services like (IBM, Google Cloud, Google Speech Recognition, Sphinx, Wit-AI, Bing Speech Recognition).

captcha

And once the results are collected then it presents captcha solution.It is capable of locating “I’m not a robot” checkbox and clicks on it.Researchers also published the code of unCaptcha publically in Github.

Last February Researcher Discover “A logic vulnerability” dubbed ReBreakCaptcha that allows attackers to automate the process of bypassing reCAPTCHA fields. They published the source code in Github.

For mitigations they suggested in broadening the vocabulary of sound bites beyond just digits, adding background noise which makes the segmentation more difficult.

You can get full research paper titled unCaptcha: A Low-Resource Defeat of reCaptcha’s Audio Challenge available to download here.

Website

Latest articles

Hacker Customize LockBit 3.0 Ransomware to Attack Orgs Worldwide

Cybersecurity researchers at Kaspersky have uncovered evidence that cybercriminal groups are customizing the virulent...

Microsoft .NET, .NET Framework, & Visual Studio Vulnerable To RCE Attacks

A new remote code execution vulnerability has been identified to be affecting multiple Microsoft...

LightSpy Hackers Indian Apple Device Users to Steal Sensitive Data

The revival of the LightSpy malware campaign has been observed, focusing on Indian Apple...

LightSpy Malware Attacking Android and iOS Users

A new malware known as LightSpy has been targeting Android and iOS users.This sophisticated...

This Startup Aims To Simplify End-to-End Cybersecurity, So Anyone Can Do It

The Web3 movement is going from strength to strength with every day that passes....

Alert! Palo Alto RCE Zero-day Vulnerability Actively Exploited in the Wild

In a recent security bulletin, Palo Alto Networks disclosed a critical vulnerability in its...

6-year-old Lighttpd Flaw Impacts Intel And Lenovo Servers

The software supply chain is filled with various challenges, such as untracked security vulnerabilities...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Top 3 SME Attack Vectors

Securing the Top 3 SME Attack Vectors

Cybercriminals are laying siege to small-to-medium enterprises (SMEs) across sectors. 73% of SMEs know they were breached in 2023. The real rate could be closer to 100%.

  • Stolen credentials
  • Phishing
  • Exploitation of vulnerabilities

Related Articles