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

By Max On Aug 20, 2021

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
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.

Type

Vendor

Name

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

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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unlock	unlock	unlock	unlock	unlock	unlock
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

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

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 67918
Nessus Name: Oracle Linux 5 : dnsmasq (ELSA-2009-1238)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 64819
OpenVAS Name: Debian Security Advisory DSA 1876-1 (dnsmasq)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: dnsmasq 2.33

Snort ID: 1941
Snort Message: PROTOCOL-TFTP GET filename overflow attempt
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
Fortigate IPS: 🔍

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: 🔍