CVE-2011-2520

Publication date 21 July 2011

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

fw_dbus.py in system-config-firewall 1.2.29 and earlier uses the pickle Python module unsafely during D-Bus communication between the GUI and the backend, which might allow local users to gain privileges via a crafted serialized object.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
system-config-printer	11.04 natty	Not affected
	10.10 maverick	Not affected
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Ignored end of life

Notes

mdeslaur

This is actually a flaw in the system-config-firewall backend. system-config-printer opens pickles from the backend, but since we don't ship the backend (system-config-firewall), we're not affected.

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Other references

https://www.cve.org/CVERecord?id=CVE-2011-2520