VDB-91900 · CVE-2016-6303 · BID 92984

OpenSSL 1.0.1/1.0.2 MDC2_Update 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.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OpenSSL 1.0.1/1.0.2 and classified as problematic. The affected element is the function MDC2_Update. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2016-6303. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in OpenSSL 1.0.1/1.0.2 (Network Encryption Software). This vulnerability affects the function MDC2_Update. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was published 09/22/2016 by Shi Lei as 20160922.txt as confirmed advisory (Website). The advisory is shared for download at openssl.org. This vulnerability was named CVE-2016-6303 since 07/26/2016. The attack can be initiated remotely. There are known technical details, but no exploit is available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 370262 (Apple macOS Sierra Security Update 10.12.2 Not Installed (APPLE-SA-2016-12-13-1)).

Upgrading to version 1.0.1u or 1.0.2i 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 SecurityFocus (BID 92984†). Similar entries are available at VDB-87879, VDB-88080, VDB-90937 and VDB-90940. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Network Encryption Software

Name

OpenSSL

Version

License

open-source

Support

end of life (old version)

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: OpenSSL 1.0.1u/1.0.2i
Patch: 55d83bf7c10c7b205fffa23fa7c3977491e56c07

Timelineinfo

07/26/2016 🔍
08/20/2016 +25 days 🔍
09/22/2016 +33 days 🔍
09/22/2016 +0 days 🔍
09/23/2016 +1 days 🔍
09/22/2024 +2921 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 20160922.txt
Researcher: Shi Lei
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6303 (🔍)
GCVE (CVE): GCVE-0-2016-6303
GCVE (VulDB): GCVE-100-91900
SecurityFocus: 92984 - OpenSSL CVE-2016-6303 Integer Overflow Vulnerability
SecurityTracker: 1036885

See also: 🔍

Entryinfo

Created: 09/23/2016 18:11
Updated: 09/22/2024 14:01
Changes: 09/23/2016 18:11 (48), 07/07/2019 16:32 (6), 09/20/2022 09:47 (5), 09/20/2022 09:48 (18), 09/22/2024 14:01 (16)
Complete: 🔍
Cache ID: 216::103