Scientific Linux Security Update : dnsmasq on SL5.x i386/x86_64

medium Nessus Plugin ID 60649

Synopsis

The remote Scientific Linux host is missing a security update.

Description

CVE-2009-2957, CVE-2009-2958 dnsmasq: multiple vulnerabilities in TFTP server

Core Security Technologies discovered a heap overflow flaw in dnsmasq when the TFTP service is enabled (the '--enable-tftp' command line option, or by enabling 'enable-tftp' in '/etc/dnsmasq.conf'). If the configured tftp-root is sufficiently long, and a remote user sends a request that sends a long file name, dnsmasq could crash or, possibly, execute arbitrary code with the privileges of the dnsmasq service (usually the unprivileged 'nobody' user). (CVE-2009-2957)

A NULL pointer dereference flaw was discovered in dnsmasq when the TFTP service is enabled. This flaw could allow a malicious TFTP client to crash the dnsmasq service. (CVE-2009-2958)

Note: The default tftp-root is '/var/ftpd', which is short enough to make it difficult to exploit the CVE-2009-2957 issue; if a longer directory name is used, arbitrary code execution may be possible. As well, the dnsmasq package distributed by Red Hat does not have TFTP support enabled by default.

After installing the updated package, the dnsmasq service must be restarted for the update to take effect.

Solution

Update the affected dnsmasq package.

See Also

http://www.nessus.org/u?c3651c23

Plugin Details

Severity: Medium

ID: 60649

File Name: sl_20090831_dnsmasq_on_SL5_x.nasl

Version: 1.6

Type: local

Agent: unix

Published: 8/1/2012

Updated: 1/14/2021

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

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

Patch Publication Date: 8/31/2009

Reference Information

CVE: CVE-2009-2957, CVE-2009-2958

CWE: 119, 399