RHEL 6 : busybox (RHSA-2012:0810)

critical Nessus Plugin ID 59586

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Synopsis

The remote Red Hat host is missing one or more security updates for busybox.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:0810 advisory.

BusyBox provides a single binary that includes versions of a large number of system commands, including a shell. This can be very useful for recovering from certain types of system failures, particularly those involving broken shared libraries.

A buffer underflow flaw was found in the way the uncompress utility of BusyBox expanded certain archive files compressed using Lempel-Ziv compression. If a user were tricked into expanding a specially-crafted archive file with uncompress, it could cause BusyBox to crash or, potentially, execute arbitrary code with the privileges of the user running BusyBox. (CVE-2006-1168)

The BusyBox DHCP client, udhcpc, did not sufficiently sanitize certain options provided in DHCP server replies, such as the client hostname. A malicious DHCP server could send such an option with a specially-crafted value to a DHCP client. If this option's value was saved on the client system, and then later insecurely evaluated by a process that assumes the option is trusted, it could lead to arbitrary code execution with the privileges of that process. Note: udhcpc is not used on Red Hat Enterprise Linux by default, and no DHCP client script is provided with the busybox packages. (CVE-2011-2716)

This update also fixes the following bugs:

* Prior to this update, the findfs command did not recognize Btrfs partitions. As a consequence, an error message could occur when dumping a core file. This update adds support for recognizing such partitions so the problem no longer occurs. (BZ#751927)

* If the grep command was used with the -F and -i options at the same time, the -i option was ignored. As a consequence, the grep -iF command incorrectly performed a case-sensitive search instead of an insensitive search. A patch has been applied to ensure that the combination of the -F and -i options works as expected. (BZ#752134)

* Prior to this update, the msh shell did not support the set -o pipefail command. This update adds support for this command. (BZ#782018)

* Previously, the msh shell could terminate unexpectedly with a segmentation fault when attempting to execute an empty command as a result of variable substitution (for example msh -c '$nonexistent_variable').
With this update, msh has been modified to correctly interpret such commands and no longer crashes in this scenario. (BZ#809092)

* Previously, the msh shell incorrectly executed empty loops. As a consequence, msh never exited such a loop even if the loop condition was false, which could cause scripts using the loop to become unresponsive.
With this update, msh has been modified to execute and exit empty loops correctly, so that hangs no longer occur. (BZ#752132)

All users of busybox are advised to upgrade to these updated packages, which contain backported patches to fix these issues.

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

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

Solution

Update the RHEL busybox package based on the guidance in RHSA-2012:0810.

Plugin Details

Severity: Critical

ID: 59586

File Name: redhat-RHSA-2012-0810.nasl

Version: 1.22

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 6/20/2012

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: 6.7

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2006-1168

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:busybox-petitboot, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:busybox

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: 6/20/2012

Vulnerability Publication Date: 8/14/2006

Reference Information

CVE: CVE-2006-1168, CVE-2011-2716

BID: 48879

RHSA: 2012:0810

Detections

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