RHEL 6 : system-config-firewall (RHSA-2011:0953)

high Nessus Plugin ID 55616

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Synopsis

The remote Red Hat host is missing a security update for system-config-firewall.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:0953 advisory.

system-config-firewall is a graphical user interface for basic firewall setup.

It was found that system-config-firewall used the Python pickle module in an insecure way when sending data (via D-Bus) to the privileged back-end mechanism. A local user authorized to configure firewall rules using system-config-firewall could use this flaw to execute arbitrary code with root privileges, by sending a specially-crafted serialized object.
(CVE-2011-2520)

Red Hat would like to thank Marco Slaviero of SensePost for reporting this issue.

This erratum updates system-config-firewall to use JSON (JavaScript Object Notation) for data exchange, instead of pickle. Therefore, an updated version of system-config-printer that uses this new communication data format is also provided in this erratum.

Users of system-config-firewall are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. Running instances of system-config-firewall must be restarted before the utility will be able to communicate with its updated back-end.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL system-config-firewall package based on the guidance in RHSA-2011:0953.

Plugin Details

Severity: High

ID: 55616

File Name: redhat-RHSA-2011-0953.nasl

Version: 1.20

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/19/2011

Updated: 11/4/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2011-2520

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:system-config-printer-udev, p-cpe:/a:redhat:enterprise_linux:system-config-printer-libs, p-cpe:/a:redhat:enterprise_linux:system-config-firewall-base, p-cpe:/a:redhat:enterprise_linux:system-config-firewall, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:system-config-printer, p-cpe:/a:redhat:enterprise_linux:system-config-firewall-tui

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 7/18/2011

Vulnerability Publication Date: 7/21/2011

Reference Information

CVE: CVE-2011-2520

BID: 48715

CWE: 502

RHSA: 2011:0953

Detections

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