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The word ZERO-DAY is hidden amidst a screen filled with ones and zeroes.

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Unknown threat actors are actively targeting two critical zero-day vulnerabilities that allow them to bypass two-factor authentication and execute malicious code inside networks that use a widely used virtual private network appliance sold by Ivanti, researchers said Wednesday.

Ivanti reported bare-bones details concerning the zero-days in posts published on Wednesday that urged customers to follow mitigation guidance immediately. Tracked as CVE-2023-846805 and CVE-2024-21887, they reside in Ivanti Connect Secure, a VPN appliance often abbreviated as ICS. Formerly known as Pulse Secure, the widely used VPN has harbored previous zero-days in recent years that came under widespread exploitation, in some cases to devastating effect.

Exploiters: Start your engines

“When combined, these two vulnerabilities make it trivial for attackers to run commands on the system,” researchers from security firm Volexity wrote in a post summarizing their investigative findings of an attack that hit a customer last month. “In this particular incident, the attacker leveraged these exploits to steal configuration data, modify existing files, download remote files, and reverse tunnel from the ICS VPN appliance.” Researchers Matthew Meltzer, Robert Jan Mora, Sean Koessel, Steven Adair, and Thomas Lancaster went on to write:

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source https://arstechnica.com/?p=1995172

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