VDB-80636 · CVE-2015-6925 · Nessus 93443

wolfSSL up to 3.6.7 DTLS Cookie ClientHello Message resource management

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.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in wolfSSL up to 3.6.7. The affected element is an unknown function of the component DTLS Cookie Handler. Such manipulation as part of ClientHello Message leads to resource management. This vulnerability is documented as CVE-2015-6925. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in wolfSSL up to 3.6.7 and classified as critical. Affected by this issue is an unknown part of the component DTLS Cookie Handler. The manipulation as part of a ClientHello Message leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

wolfSSL (formerly CyaSSL) before 3.6.8 allows remote attackers to cause a denial of service (resource consumption or traffic amplification) via a crafted DTLS cookie in a ClientHello message.

The weakness was released 01/22/2016 (Website). The advisory is shared for download at wolfssl.com. This vulnerability is handled as CVE-2015-6925 since 09/12/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 93443 (FreeBSD : wolfssl -- DDoS amplification in DTLS (3d1372e1-7822-4fd8-b56e-5ee832afbd96)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading to version 3.6.8 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (93443). Entry connected to this vulnerability is available at VDB-80603. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

wolfSSL

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 93443
Nessus Name: FreeBSD : wolfssl -- DDoS amplification in DTLS (3d1372e1-7822-4fd8-b56e-5ee832afbd96)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: wolfSSL 3.6.8

Timelineinfo

09/12/2015 🔍
01/05/2016 +115 days 🔍
01/22/2016 +17 days 🔍
01/22/2016 +0 days 🔍
01/25/2016 +3 days 🔍
09/13/2016 +232 days 🔍
06/28/2018 +653 days 🔍

Sourcesinfo

Advisory: wolfssl.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-6925 (🔍)
GCVE (CVE): GCVE-0-2015-6925
GCVE (VulDB): GCVE-100-80636
See also: 🔍

Entryinfo

Created: 01/25/2016 10:51
Updated: 06/28/2018 10:28
Changes: 01/25/2016 10:51 (53), 06/28/2018 10:28 (15)
Complete: 🔍
Cache ID: 216::103