Thekelleys dnsmasq up to 2.32 tftp.c tftp_request resource management

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Thekelleys dnsmasq up to 2.32. This issue affects the function tftp_request of the file tftp.c. Performing a manipulation results in resource management. This vulnerability is cataloged as CVE-2009-2958. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Thekelleys dnsmasq up to 2.32 (Domain Name Software). This affects the function tftp_request of the file tftp.c. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a TFTP read (aka RRQ) request with a malformed blksize option.

The weakness was shared 09/02/2009 by Core Security (Website). It is possible to read the advisory at rhn.redhat.com. This vulnerability is uniquely identified as CVE-2009-2958. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Core Security and been published 1 weeks after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 43778 (CentOS 5 : dnsmasq (CESA-2009:1238)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS 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.

The vulnerability is also documented in the databases at X-Force (52974), Exploit-DB (9617), Tenable (43778), SecurityFocus (BID 36120†) and Secunia (SA36563†). The entries VDB-40214, VDB-51836, VDB-51835 and VDB-51834 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 43778
Nessus Name: CentOS 5 : dnsmasq (CESA-2009:1238)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

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: 🔍
SourceFire IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

08/24/2009 🔍
09/02/2009 +9 days 🔍
09/02/2009 +0 days 🔍
09/02/2009 +0 days 🔍
09/06/2009 +4 days 🔍
09/09/2009 +3 days 🔍
09/09/2009 +0 days 🔍
03/18/2015 +2016 days 🔍
02/03/2025 +3610 days 🔍

Sourcesinfo

Advisory: rhn.redhat.com
Researcher: Core Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2958 (🔍)
GCVE (CVE): GCVE-0-2009-2958
GCVE (VulDB): GCVE-100-49779

OVAL: 🔍

X-Force: 52974
SecurityFocus: 36120
Secunia: 36563
Vulnerability Center: 23397 - Dnsmasq <2.50 with --enable-tftp Used tftp.c Heap-Based Buffer Overflow Allows Remote DoS, Medium

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

Entryinfo

Created: 03/18/2015 15:15
Updated: 02/03/2025 07:15
Changes: 03/18/2015 15:15 (70), 02/13/2017 16:16 (14), 08/20/2021 20:27 (4), 08/20/2021 20:34 (1), 02/03/2025 07:15 (15)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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