2009-2957 | Thekelleys dnsmasq tftp.c tftp_request memory corruption (BID-36121 / XFDB-52973)

CVSS Meta Temp Score

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Current Exploit Price (≈)

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CTI Interest Score

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6.6 $0-$5k 0.42

A vulnerability was found in Thekelleys dnsmasq up to 2.32 (Domain Name Software). It has been rated as critical. Affected by this issue is the function tftp_request of the file tftp.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is confidentiality, integrity, and availability.

The weakness was presented 09/02/2009 by Core Security (Website). The advisory is available at securityfocus.com. This vulnerability is handled as CVE-2009-2957 since 08/24/2009. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed by Core Security and been published 1 weeks after the advisory. It is declared as proof-of-concept. The exploit is available at exploit-db.com. The vulnerability scanner Nessus provides a plugin with the ID 67918 (Oracle Linux 5 : dnsmasq (ELSA-2009-1238)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155834 (Oracle Enterprise Linux Update for dnsmasq (ELSA-2009-1238)).

Upgrading to version 2.33 eliminates this vulnerability. Attack attempts may be identified with Snort ID 1941. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12125.

The vulnerability is also documented in the databases at SecurityFocus (BID 36121), X-Force (52973), Vulnerability Center (SBV-23391) and Tenable (67918). See 49779 for similar entry.




VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Core Security
Download: 🔍

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Nessus ID: 67918
Nessus Name: Oracle Linux 5 : dnsmasq (ELSA-2009-1238)
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OpenVAS ID: 64819
OpenVAS Name: Debian Security Advisory DSA 1876-1 (dnsmasq)
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Threat Intelligenceinfoedit

Interest: 🔍
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Active APT Groups: 🔍Recommended: Upgrade
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Upgrade: dnsmasq 2.33

Snort ID: 1941
Snort Message: PROTOCOL-TFTP GET filename overflow attempt
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08/24/2009 🔍
08/31/2009 +7 days 🔍
08/31/2009 +0 days 🔍
09/02/2009 +2 days 🔍
09/02/2009 +0 days 🔍
09/06/2009 +4 days 🔍
09/09/2009 +3 days 🔍
09/09/2009 +0 days 🔍
07/12/2013 +1402 days 🔍
03/18/2015 +614 days 🔍
08/20/2021 +2347 days 🔍Advisory: securityfocus.com
Researcher: Core Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2957 (🔍)

SecurityFocus: 36121 – Dnsmasq TFTP Service Remote Heap Buffer Overflow Vulnerability
X-Force: 52973
Vulnerability Center: 23391 – Dnsmasq <2.50 with –enable-tftp Used tftp.c Heap-Based Buffer Overflow Allows Remote Code Execution, High

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Created: 03/18/2015 15:15
Updated: 08/20/2021 20:19
Changes: (1) source_nessus_risk
Complete: 🔍


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