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Debian DSA-2217-1 : dhcp3 - missing input sanitization

high Nessus Plugin ID 53344

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Synopsis

The remote Debian host is missing a security-related update.

Description

Sebastian Krahmer and Marius Tomaschewski discovered that dhclient of dhcp3, a DHCP client, is not properly filtering shell meta-characters in certain options in DHCP server responses. These options are reused in an insecure fashion by dhclient scripts. This allows an attacker to execute arbitrary commands with the privileges of such a process by sending crafted DHCP options to a client using a rogue server.

Solution

Upgrade the dhcp3 packages.

For the oldstable distribution (lenny), this problem has been fixed in version 3.1.1-6+lenny5.

For the stable (squeeze), testing (wheezy) and unstable (sid) distributions, this problem has been fixed in an additional update for isc-dhcp.

See Also

https://www.debian.org/security/2011/dsa-2217

Plugin Details

Severity: High

ID: 53344

File Name: debian_DSA-2217.nasl

Version: 1.11

Type: local

Agent: unix

Published: 4/11/2011

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.8

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:dhcp3, cpe:/o:debian:debian_linux:5.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/10/2011

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2011-0997

BID: 47176

DSA: 2217