VDB-93545 · CVE-2016-7053 · BID 94244

OpenSSL 1.1.0/1.1.0a/1.1.0b CMS Structure null pointer dereference

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.

A vulnerability was found in OpenSSL 1.1.0/1.1.0a/1.1.0b (Network Encryption Software). It has been rated as problematic. This issue affects an unknown code of the component CMS Structure Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was published 11/10/2016 by Tyler Nighswander as 20161110.txt as confirmed security advisory (Website). The advisory is shared at openssl.org. The public release has been coordinated with the project team. The identification of this vulnerability is CVE-2016-7053. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The advisory points out:

Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.

The vulnerability was handled as a non-public zero-day exploit for at least 29 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 94691 (FreeBSD : openssl -- multiple vulnerabilities (50751310-a763-11e6-a881-b499baebfeaf)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38649 (OpenSSL Multiple Vulnerabilities (OpenSSL Security Advisory 20161110)).

Upgrading to version 1.1.0c eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (94691). Similar entries are available at 93544 and 93546.





  • open-source


  • end of life (version)

CPE 2.3info

CPE 2.2info


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: 🔍



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

NVD Base Score: 🔍


Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 94691
Nessus Name: FreeBSD : openssl -- multiple vulnerabilities (50751310-a763-11e6-a881-b499baebfeaf)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 800489
OpenVAS Name: OpenSSL Multiple Vulnerabilities -Nov 16 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

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

Upgrade: OpenSSL 1.1.0c


08/23/2016 🔍
10/12/2016 +50 days 🔍
11/10/2016 +29 days 🔍
11/10/2016 +0 days 🔍
11/10/2016 +0 days 🔍
11/10/2016 +0 days 🔍
05/04/2017 +175 days 🔍
10/03/2022 +1978 days 🔍


Product: openssl.org

Advisory: 20161110.txt
Researcher: Tyler Nighswander
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2016-7053 (🔍)

SecurityTracker: 1037261 - OpenSSL Multiple Bugs Let Remote Users Cause the Target Application to Crash
SecurityFocus: 94244

See also: 🔍


Created: 11/10/2016 08:08 PM
Updated: 10/03/2022 07:23 AM
Changes: 11/10/2016 08:08 PM (50), 02/24/2017 04:48 PM (23), 10/03/2022 07:03 AM (3), 10/03/2022 07:16 AM (11), 10/03/2022 07:23 AM (1)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Do you want to use VulDB in your project?

Use the official API to access entries easily!