VDB-81142 · CVE-2016-0705 · BID 83754

OpenSSL 1.0.1/1.0.2 DSA Key double free

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.
8.5	$5k-$25k	0.00

A vulnerability was found in OpenSSL 1.0.1/1.0.2 (Network Encryption Software). It has been declared as critical. This vulnerability affects an unknown code block of the component DSA Key Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-415. As an impact it is known to affect availability.

The weakness was disclosed 03/01/2016 by Adam Langley as 20160301.txt as confirmed advisory (Website). The advisory is available at openssl.org. This vulnerability was named CVE-2016-0705 since 12/16/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/01/2018).

The vulnerability scanner Nessus provides a plugin with the ID 89842 (Amazon Linux AMI : openssl (ALAS-2016-661) (DROWN) (SLOTH)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371180 (IBM Java SDK Multiple Vulnerabilities (Oracle July 17 2018 CPU (1.6.0_201, 1.7.0_191, 1.8.0_181))).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 83754), X-Force (111140), Vulnerability Center (SBV-57003) and Tenable (89842). The entries 81112, 81133, 81138 and 81139 are pretty similar.

Productinfoedit

Type

Network Encryption Software

Name

OpenSSL

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.5

VulDB Base Score: 9.8
VulDB Temp Score: 8.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2infoedit

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

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-415
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 89842
Nessus Name: Amazon Linux AMI : openssl (ALAS-2016-661) (DROWN) (SLOTH)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 12024
OpenVAS Name: Mageia Linux Local Check: mgasa-2016-0093
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfoedit

12/16/2015 🔍
02/29/2016 +75 days 🔍
03/01/2016 +0 days 🔍
03/01/2016 +0 days 🔍
03/01/2016 +0 days 🔍
03/03/2016 +1 days 🔍
03/03/2016 +0 days 🔍
03/05/2016 +2 days 🔍
03/10/2016 +5 days 🔍
02/13/2017 +340 days 🔍
09/01/2018 +564 days 🔍

Sourcesinfoedit

Product: https://www.openssl.org/

Advisory: 20160301.txt
Researcher: Adam Langley
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0705 (🔍)
OVAL: 🔍

SecurityFocus: 83754 - OpenSSL CVE-2016-0705 Denial of Service Vulnerability
X-Force: 111140 - OpenSSL DSA key denial of service
Vulnerability Center: 57003 - OpenSSL Remote Code Execution via Malformed DSA Private Keys - CVE-2016-0705, High

See also: 🔍

Entryinfoedit