CVE-2021-44735: (Pwn2Own) Lexmark MC3224i setuid Local Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Lexmark MC3224i printers. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the permissions set on root-owned service files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

This vulnerability allows local attackers to escalate privileges on affected installations of Lexmark MC3224i printers. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the permissions set on root-owned service files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Lexmark MC3224i printers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the processing of packet captures. When parsing the filter property, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the www-data user.