CVE-2011-2520

Name: CVE-2011-2520
Creator: NVD / NIST
Published: 2011-07-21T23:55:03.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.42%

Last modified Jun 16, 2026

CVE-2011-2520 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.42%

33.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Redhat	System-Config-Firewall	<= 1.2.29
Fedoraproject	Fedora	15

References

http://lists.fedoraproject.org/pipermail/package-announce/2011-August/063314.htmlMailing List
http://secunia.com/advisories/45294Not Applicable
http://securitytracker.com/id?1025793Broken Link
http://www.openwall.com/lists/oss-security/2011/07/18/6Mailing List
http://www.redhat.com/support/errata/RHSA-2011-0953.htmlNot Applicable
http://www.securityfocus.com/bid/48715Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=717985Issue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/68734Third Party Advisory, VDB Entry
http://lists.fedoraproject.org/pipermail/package-announce/2011-August/063314.htmlMailing List
http://secunia.com/advisories/45294Not Applicable
http://securitytracker.com/id?1025793Broken Link
http://www.openwall.com/lists/oss-security/2011/07/18/6Mailing List
http://www.redhat.com/support/errata/RHSA-2011-0953.htmlNot Applicable
http://www.securityfocus.com/bid/48715Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=717985Issue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/68734Third Party Advisory, VDB Entry

Timeline

Published: Jul 21, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-2520?

How severe is CVE-2011-2520?

CVE-2011-2520 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2011-2520?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-2520?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST