Dnsmasq up to 2.20 DNS Cache memory corruption

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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Dnsmasq up to 2.20. Affected by this vulnerability is an unknown functionality of the component DNS Cache. The manipulation leads to memory corruption. This vulnerability is referenced as CVE-2005-0877. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Dnsmasq up to 2.20 (Domain Name Software). It has been rated as critical. This issue affects some unknown processing of the component DNS Cache. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Dnsmasq before 2.21 allows remote attackers to poison the DNS cache via answers to queries that were not made by Dnsmasq.

The bug was discovered 03/25/2005. The weakness was published 05/02/2005 (Website). It is possible to read the advisory at xforce.iss.net. The identification of this vulnerability is CVE-2005-0877 since 03/26/2005. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 17631 (dnsmasq < 2.21.0 Multiple Remote Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family DNS and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38497 (Dnsmasq Multiple Remote Vulnerabilities).

Upgrading to version 2.21 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (19826), Tenable (17631), SecurityFocus (BID 12897†), OSVDB (15000†) and Secunia (SA14691†). Similar entries are available at VDB-24694 and VDB-43410. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Domain Name Software

Name

• Dnsmasq

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 17631
Nessus Name: dnsmasq < 2.21.0 Multiple Remote Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 54386
OpenVAS Name: Slackware Advisory SSA:2005-201-01 dnsmasq
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Dnsmasq 2.21

Timelineinfo

03/25/2005 🔍
03/25/2005 +0 days 🔍
03/25/2005 +0 days 🔍
03/25/2005 +0 days 🔍
03/26/2005 +1 days 🔍
03/29/2005 +3 days 🔍
05/02/2005 +34 days 🔍
05/02/2005 +0 days 🔍
03/10/2015 +3599 days 🔍
07/04/2025 +3769 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-0877 (🔍)
GCVE (CVE): GCVE-0-2005-0877
GCVE (VulDB): GCVE-100-24695
X-Force: 19826
SecurityFocus: 12897 - Dnsmasq Multiple Remote Vulnerabilities
Secunia: 14691
OSVDB: 15000 - CVE-2005-0877 - Dnsmasq - DNS Poisoning Issue
Vulnerability Center: 7453 - DNS Cache Poisoning in Dnsmasq, Medium

See also: 🔍

Entryinfo

Created: 03/10/2015 23:05
Updated: 07/04/2025 19:35
Changes: 03/10/2015 23:05 (63), 06/06/2019 10:55 (13), 07/04/2025 19:35 (19)
Complete: 🔍
Cache ID: 216::103

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