Mandriva Linux Security Advisory : dhcp (MDVSA-2012:115)

Medium Nessus Plugin ID 61967


The remote Mandriva Linux host is missing one or more security updates.


Multiple vulnerabilities has been discovered and corrected in ISC DHCP :

An unexpected client identifier parameter can cause the ISC DHCP daemon to segmentation fault when running in DHCPv6 mode, resulting in a denial of service to further client requests. In order to exploit this condition, an attacker must be able to send requests to the DHCP server (CVE-2012-3570).

An error in the handling of malformed client identifiers can cause a DHCP server running affected versions (see Impact) to enter a state where further client requests are not processed and the server process loops endlessly, consuming all available CPU cycles. Under normal circumstances this condition should not be triggered, but a non-conforming or malicious client could deliberately trigger it in a vulnerable server. In order to exploit this condition an attacker must be able to send requests to the DHCP server (CVE-2012-3571).

Two memory leaks have been found and fixed in ISC DHCP. Both are reproducible when running in DHCPv6 mode (with the -6 command-line argument.) The first leak is confirmed to only affect servers operating in DHCPv6 mode, but based on initial code analysis the second may theoretically affect DHCPv4 servers (though this has not been demonstrated.) (CVE-2012-3954).

The updated packages have been upgraded to the latest version (4.2.4-P1) which is not affected by these issues.


Update the affected packages.

Plugin Details

Severity: Medium

ID: 61967

File Name: mandriva_MDVSA-2012-115.nasl

Version: $Revision: 1.6 $

Type: local

Published: 2012/09/06

Modified: 2013/10/18

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.1

Temporal Score: 5.3

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:mandriva:linux:dhcp-client, p-cpe:/a:mandriva:linux:dhcp-common, p-cpe:/a:mandriva:linux:dhcp-devel, p-cpe:/a:mandriva:linux:dhcp-doc, p-cpe:/a:mandriva:linux:dhcp-relay, p-cpe:/a:mandriva:linux:dhcp-server, cpe:/o:mandriva:linux:2011

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2012/07/26

Reference Information

CVE: CVE-2012-3570, CVE-2012-3571, CVE-2012-3954

BID: 54665

MDVSA: 2012:115