Detections
Analytics
RHEL 4 / 5 / 6 : dhcp (RHSA-2011:0428)
high Nessus Plugin ID 53352
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Synopsis
The remote Red Hat host is missing a security update for dhcp.Description
The remote Redhat Enterprise Linux 4 / 5 / 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:0428 advisory.The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address.
It was discovered that the DHCP client daemon, dhclient, 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. (CVE-2011-0997)
Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue.
All dhclient users should upgrade to these updated packages, which contain a backported patch to correct this issue.
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 dhcp package based on the guidance in RHSA-2011:0428.See Also
http://www.nessus.org/u?3f32f3a8
https://access.redhat.com/security/updates/classification/#important
Plugin Details
Severity: High
ID: 53352
File Name: redhat-RHSA-2011-0428.nasl
Version: 1.24
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 4/11/2011
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: 5.1
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.2
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2011-0997
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:libdhcp4client, p-cpe:/a:redhat:enterprise_linux:dhcp-devel, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:4, p-cpe:/a:redhat:enterprise_linux:dhcp, p-cpe:/a:redhat:enterprise_linux:libdhcp4client-devel, p-cpe:/a:redhat:enterprise_linux:dhclient
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/8/2011
Vulnerability Publication Date: 4/8/2011
Exploitable With
CANVAS (CANVAS)
Reference Information
CVE: CVE-2011-0997
BID: 47176