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Test ID:1.3.6.1.4.1.25623.1.0.100267
Category:Buffer overflow
Title:Dnsmasq TFTP Service 2.40 - 2.49 Multiple Vulnerabilities
Summary:Dnsmasq is prone to a remotely exploitable; heap-overflow vulnerability because the software fails to properly bounds-check; user-supplied input before copying it into an insufficiently sized memory buffer.
Description:Summary:
Dnsmasq is prone to a remotely exploitable
heap-overflow vulnerability because the software fails to properly bounds-check
user-supplied input before copying it into an insufficiently sized memory buffer.

Vulnerability Insight:
NOTE: The TFTP service must be enabled for this issue
to be exploitable. This is not the default.

Vulnerability Impact:
Remote attackers can exploit this issue to execute
arbitrary machine code in the context of the vulnerable software on the targeted
user's computer.

Dnsmasq is also prone to a NULL-pointer dereference vulnerability.
An attacker can exploit this issue to crash the affected application, denying
service to legitimate users.

Affected Software/OS:
Dnsmasq 2.40 through 2.49. Older versions are
probably affected too, but they were not checked.

Solution:
Update to version 2.50 or later.

CVSS Score:
6.8

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

Cross-Ref: BugTraq ID: 36121
BugTraq ID: 36120
Common Vulnerability Exposure (CVE) ID: CVE-2009-2957
http://www.securityfocus.com/bid/36121
http://www.coresecurity.com/content/dnsmasq-vulnerabilities
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10538
http://www.redhat.com/support/errata/RHSA-2009-1238.html
RedHat Security Advisories: RHSA-2010:0095
https://rhn.redhat.com/errata/RHSA-2010-0095.html
http://secunia.com/advisories/36563
http://www.ubuntu.com/usn/USN-827-1
Common Vulnerability Exposure (CVE) ID: CVE-2009-2958
http://www.securityfocus.com/bid/36120
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9816
CopyrightCopyright (C) 2009 Greenbone Networks GmbH

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