Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Vulnerabilities

Critical Vulnerability Found in Cuckoo Sandbox

The developers of the popular malware analysis framework Cuckoo Sandbox were forced to take quick action on Tuesday after being notified of the existence of a serious vulnerability that can potentially be exploited to take control of affected systems.

The developers of the popular malware analysis framework Cuckoo Sandbox were forced to take quick action on Tuesday after being notified of the existence of a serious vulnerability that can potentially be exploited to take control of affected systems.

The flaw was uncovered by researchers at security firm G Data Software who reported their findings to Cuckoo Sandbox developers on October 7. The issue was addressed just hours later with the release of Cuckoo Sandbox 1.1.1.

The vulnerability, which affects all versions of the malware analysis framework starting with version 0.6, allows an attacker to upload arbitrary files from the virtual machine to the host system. This sandbox evasion could lead to arbitrary code or command execution.

“Due to an insufficient sanitizing of the ‘buf’ variable, an attacker could craft an executable that, when analyzed by the sandbox, would instruct the Cuckoo daemon to create or overwrite any arbitrary file on the host system. Under some circumstances, this could lead to command or code execution on the host system, from within the virtual machine. The issue relies on some behavior from Python’s os.path.join() function that we did not expect,” Cuckoo Sandbox developers wrote in a blog post accompanying the software update.

G Data has pointed out that the open source software is used by law enforcement, security firms, and independent researchers. However, since it’s free, it’s mostly popular among independent researchers and smaller organizations.

 “Generally speaking, this attack allows it for malware authors to break into the systems of those that are trying to fight them,” G Data explained in a blog post. “This can be achieved by writing tailored malware that actively tries to exploit Cuckoo sandboxes. Prerequisite is that the attackers can enforce to be executed by a Cuckoo sandbox instance, for example by uploading the malicious files to a public web interfaces to an analysis framework.”

The vulnerability has been addressed with a simple hotfix, but Cuckoo Sandbox developers say they will reconsider the design of the vulnerable mechanism in the current development branch.

 

Advertisement. Scroll to continue reading.
Written By

Eduard Kovacs (@EduardKovacs) is a managing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Trending

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join this event as we dive into threat hunting tools and frameworks, and explore value of threat intelligence data in the defender’s security stack.

Register

Learn how integrating BAS and Automated Penetration Testing empowers security teams to quickly identify and validate threats, enabling prompt response and remediation.

Register

People on the Move

Shane Barney has been appointed CISO of password management and PAM solutions provider Keeper Security.

Edge Delta has appointed Joan Pepin as its Chief Information Security Officer.

Vats Srivatsan has been appointed interim CEO of WatchGuard after Prakash Panjwani stepped down.

More People On The Move

Expert Insights

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest cybersecurity news, threats, and expert insights. Unsubscribe at any time.