XZ Utils is a set of free open-source software, including a data compression utility which is quote commonly used for compressing files and creating archives.
The attacker infiltrated the development process by pretending to be an established contributor, gaining access to commit changes to the XZ Utils project. They then introduced a malicious code disguised as a harmless update, which was accepted unknowingly by other developers.
The backdoor code allowed the attacker to remotely execute commands on the systems of users who downloaded the compromised version of XZ Utils. This posed a significant security risk as the attacker could potentially gain unauthorized access to sensitive information.
The backdoor code was discovered during a routine security audit conducted by independent cybersecurity researchers who identified suspicious behavior in the latest version of XZ Utils.
Upon discovery of the backdoor code, the XZ Utils development team immediately removed the malicious code and released an updated version of the software. They also issued a security advisory urging users to update to the latest version to prevent further exploitation.
Users can protect themselves by verifying the legitimacy of software updates before installing them, using reputable sources for downloading software, and regularly updating their security software to detect and prevent malicious code.
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Hacker inserted backdoor code into XZ Utils through social engineering.