A newly discovered flaw in a common piece of open-source software is prompting researchers and companies to update their systems in a bid to prevent hacks and ransomware attacks.
Since the vulnerability, which some dubbed “Log4Shell,” so is widespread and is likely present in highly-trafficked websites and apps, users may also see their favorite websites and apps be impacted.
Cybersecurity firms Mandiant and Crowdstrike said that hacking groups are trying to breach systems, and Mandiant described to Reuters that they are “Chinese government actors,” in reference to the ruling Chinese Communist Party.
A cybercriminal can exploit the flaw by sending a malicious code string that will get logged by the Log4j version, allowing the attacker to load an arbitrary Java code to a server. The vulnerability could potentially allow them to take control of the server.
Federal cybersecurity officials also reportedly expressed alarm over the vulnerability in recent days.
Easterly warned that CISA can “expect the vulnerability to be widely exploited by sophisticated actors and we have limited time to take necessary steps in order to reduce the likelihood of damaging incidents.”
The proverbial canary in the coal mine was when researchers noted that Minecraft’s servers could be compromised via the vulnerability. Microsoft last week posted instructions for how players could update the game’s Java version.
“This exploit affects many services—including Minecraft Java Edition,” said Microsoft. “This vulnerability poses a potential risk of your computer being compromised.”
Elaborating on what services could be targeted via the exploit, Wortley said that “Cloud services like Steam, Apple iCloud, and apps like Minecraft” have been discovered to be vulnerable. “Anybody using Apache Struts is likely vulnerable. We’ve seen similar vulnerabilities exploited before in breaches like the 2017 Equifax data breach,” he said, referring to the hack that released millions of people’s credit data.