CVE-2011-2520: fw_dbus.py in system-config-firewall 1.2.29 and earlier uses the pickle Python module unsafely during D-Bus...

Security readout for executives and security teams

A local user on a system with vulnerable system-config-firewall could potentially turn access to that host into higher privileges. The weakness is unsafe Python pickle handling in D-Bus communication between the firewall GUI and backend. It matters mainly for legacy Linux systems where this package remains installed. Exposure is likely limited to legacy Red Hat/Fedora-family systems or derivatives with system-config-firewall 1.2.29 or earlier installed. Internet-facing exposure is not indicated; the reported attack path requires local user access. Treat as high priority for legacy Linux environments with local users, shared administration, or weaker account controls. It is not an internet-facing emergency based on the provided evidence, but privilege escalation can materially worsen any initial compromise. Mitigation focus: Inventory hosts for system-config-firewall version 1.2.29 or earlier.; Apply relevant Red Hat or Fedora security updates where available.; Remove the package where it is unnecessary on legacy systems..

Prepared

Jun 27, 2026, 18:09 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.