VDB-95328 · CVE-2016-8671 · BID 95439

MatrixSSL up to 3.8.6 Modular Expontiation pstm_exptmod information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in MatrixSSL up to 3.8.6. This affects the function pstm_exptmod of the component Modular Expontiation Handler. The manipulation results in information disclosure. This vulnerability was named CVE-2016-8671. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in MatrixSSL up to 3.8.6. Affected is the function pstm_exptmod of the component Modular Expontiation Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on integrity. CVE summarizes:

The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via unspecified vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-6887.

The bug was discovered 01/13/2017. The weakness was presented 01/13/2017 (Website). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-8671 since 10/15/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 95439†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.8

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103427
OpenVAS Name: MatrixSSL Cryptographic Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/15/2016 🔍
01/13/2017 +90 days 🔍
01/13/2017 +0 days 🔍
01/13/2017 +0 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
05/13/2026 +3405 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined

CVE: CVE-2016-8671 (🔍)
GCVE (CVE): GCVE-0-2016-8671
GCVE (VulDB): GCVE-100-95328
SecurityFocus: 95439 - MatrixSSL Incomplete Fix CVE-2016-8671 Memory Corruption Vulnerability
OSVDB: - CVE-2016-8671 - MatrixSSL - Information Disclosure Issue

Entryinfo

Created: 01/15/2017 10:38
Updated: 05/13/2026 08:49
Changes: 01/15/2017 10:38 (61), 07/21/2020 17:10 (5), 05/13/2026 08:49 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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