CVE-2007-4773

Vulnerability

Systrace versions prior to 1.6.0 contain a vulnerability in their escape policy enforcement mechanism. The system call policy sandbox, designed to confine untrusted applications, does not correctly handle certain escape sequences, allowing a confined process to break out of its sandbox restrictions. The affected versions include all releases before 1.6.0 [3].

Exploitation

An attacker who can execute arbitrary code within a Systrace-confined process can exploit the insufficient escape policy enforcement. By crafting specific system call sequences that trigger the escape policy weakness, the attacker can bypass the intended sandbox constraints without requiring additional authentication beyond the existing code execution capability within the confined environment [1][2].

Impact

Successful exploitation permits the confined process to escape the Systrace sandbox and execute arbitrary system calls with the original user's privileges, effectively negating the security benefits of the confinement. This could lead to full compromise of the user account under which the confined process runs, including unauthorized access to files, processes, and system resources that the sandbox was intended to protect [1][2].

Mitigation

Users should upgrade to Systrace version 1.6.0 or later, which addresses the insufficient escape policy enforcement. No effective workaround is available for earlier versions. Systrace is no longer actively maintained, so upgrading to a supported alternative may be advisable [3].