Don't click that CS:GO Steam invite - it could be malware

Steam
(Image credit: Steam/Valve)

A critical bug in Valve’s game engine has been demonstrated by a security researcher to allow hackers to take control of their victims’ computers. All the attacker needs to do is trick their victims into clicking a Steam invite link to play Counter Strike: Global Offensive (CS:GO).

Even more worryingly, the security researcher, known as "Florian" told Motherboard, said that the bug can be used to develop a worm-like exploit to infect other machines.

The vulnerability isn’t game-specific, but rather exists in the Source game engine that’s used by several popular games including CS:GO, Team Fortress 2, Dota 2, and Postal III among others. 

TechRadar needs you!

We're looking at how our readers use VPN for a forthcoming in-depth report. We'd love to hear your thoughts in the survey below. It won't take more than 60 seconds of your time.

>> Click here to start the survey in a new window<<

Slow to respond

Florian said he brought the vulnerability to Valve’s attention as part of the company’s bug bounty program back in 2019. And while the bug has been rendered ineffective on virtually all Source-powered games, it still mysteriously exists in CS:GO.

"I am honestly very disappointed because they straight up ignored me most of the time," said Florian.

While Valve didn’t return Motherboard’s request for comments, Carl Schou, founder of a not-for-profit group of security researchers called Secret Club, pointed out two other vulnerabilities that Valve failed to acknowledge even after being informed several months ago. 

"Valve's response has been a complete disappointment right from the start,” Schou told Motherboard, adding that slow response times have been the hallmark of the group’s past interactions with the popular gaming publisher and distributor.

Via: Motherboard

TOPICS
Mayank Sharma

With almost two decades of writing and reporting on Linux, Mayank Sharma would like everyone to think he’s TechRadar Pro’s expert on the topic. Of course, he’s just as interested in other computing topics, particularly cybersecurity, cloud, containers, and coding.

Read more
malware
Valve advises full system reset if you've downloaded this Steam game containing malware
Steam scam alert.
Watch out, this convincing Steam scam could risk your entire game library
Robotic hand clicking on captcha &#039;I am not a robot&#039;.
Double clicking danger - experts warn just two clicks can let attackers steal your accounts
A white padlock on a dark digital background.
GitHub is hiding malware disguised as games, legitimate software
the YouTube logo on a screen in front of other YouTube logos covering a black background
Worrying YouTube security flaw exposed billions of user emails
malware
Google warns of legit VPN apps being used to infect devices with malware
Latest in Security
Hacker silhouette working on a laptop with North Korean flag on the background
North Korea unveils new military unit targeting AI attacks
An image of network security icons for a network encircling a digital blue earth.
US government warns agencies to make sure their backups are safe from NAKIVO security issue
Laptop computer displaying logo of WordPress, a free and open-source content management system (CMS)
This top WordPress plugin could be hiding a worrying security flaw, so be on your guard
Computer Hacked, System Error, Virus, Cyber attack, Malware Concept. Danger Symbol
Veeam urges users to patch security issues which could allow backup hacks
UK Prime Minister Sir Kier Starmer
The UK releases timeline for migration to post-quantum cryptography
Representational image depecting cybersecurity protection
Cisco smart licensing system sees critical security flaws exploited
Latest in News
Ray-Ban Meta Smart Glasses
Samsung's rumored smart specs may be launching before the end of 2025
Apple iPhone 16 Review
The latest iPhone 18 leak hints at a major chipset upgrade for all four models
Quordle on a smartphone held in a hand
Quordle hints and answers for Monday, March 24 (game #1155)
NYT Strands homescreen on a mobile phone screen, on a light blue background
NYT Strands hints and answers for Monday, March 24 (game #386)
NYT Connections homescreen on a phone, on a purple background
NYT Connections hints and answers for Monday, March 24 (game #652)
Quordle on a smartphone held in a hand
Quordle hints and answers for Sunday, March 23 (game #1154)