Dnsmasq up to 2.77 DNS Packet Size size input validation

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.
6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Dnsmasq up to 2.77. This affects an unknown part of the component DNS Packet Size Handler. The manipulation of the argument size as part of Negative Value leads to input validation. This vulnerability is documented as CVE-2017-13704. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Dnsmasq up to 2.77 (Domain Name Software). It has been rated as critical. This issue affects some unknown processing of the component DNS Packet Size Handler. The manipulation of the argument size as part of a Negative Value leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero's (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.

The bug was discovered 10/02/2017. The weakness was released 10/03/2017 by Felix Wilhelm with Google Security Team (Website). It is possible to read the advisory at mail-archive.com. The identification of this vulnerability is CVE-2017-13704 since 08/25/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 103647 (dnsmasq < 2.78 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 15098 (DNSmasq DNS And DHCP Multiple Remote Vulnerabilities).

Upgrading to version 2.78 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103647) and SecurityFocus (BID 101085†). Entries connected to this vulnerability are available at VDB-29890, VDB-107354, VDB-107355 and VDB-107356. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 103647
Nessus Name: dnsmasq < 2.78 Multiple Remote Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 100841
OpenVAS Name: Dnsmasq Multiple Vulnerabilities - Oct17
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 2.78
Patch: 63437ffbb58837b214b4b92cb1c54bc5f3279928

Timelineinfo

08/25/2017 🔍
09/02/2017 +8 days 🔍
10/02/2017 +30 days 🔍
10/02/2017 +0 days 🔍
10/02/2017 +0 days 🔍
10/03/2017 +1 days 🔍
10/03/2017 +0 days 🔍
10/03/2017 +0 days 🔍
12/30/2022 +1914 days 🔍

Sourcesinfo

Advisory: SA_17_59
Researcher: Felix Wilhelm
Organization: Google Security Team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-13704 (🔍)
GCVE (CVE): GCVE-0-2017-13704
GCVE (VulDB): GCVE-100-107351
SecurityFocus: 101085 - Dnsmasq VU#973527 Multiple Security Vulnerabilities
SecurityTracker: 1039474

See also: 🔍

Entryinfo

Created: 10/03/2017 10:54
Updated: 12/30/2022 14:42
Changes: 10/03/2017 10:54 (78), 11/21/2019 09:59 (6), 01/15/2021 08:11 (3), 12/30/2022 14:42 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!