CVE-2026-35535 Sudo权限提升漏洞

# Conceptual Proof of Concept for CVE-2026-35535 # This PoC demonstrates the logic flaw where a failed setuid/setgid during privilege drop is not fatal. # Exploitation typically requires the mailer feature to be enabled in sudoers. # 1. Verify sudo version (vulnerable if <= 1.9.17p2) sudo -V | grep "Sudo version" # 2. Prepare environment # An attacker might set up a malicious script or manipulate the path used by the mailer. # Since the error is non-fatal, the mailer might execute with elevated privileges. # Example triggering command (depends on configuration triggering the mailer) # If the setuid fails inside, the process might retain root perms. echo "attempting to trigger sudo mailer path..." sudo -n invalid_command 2>&1 # Note: Successful exploitation requires specific conditions regarding # the failure of the setuid/setgid calls and control over the mailer execution context.