MatrixSSL up to 3.8.3 Modular Exponentiation pstm_exptmod use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in MatrixSSL up to 3.8.3. Affected is the function pstm_exptmod of the component Modular Exponentiation Handler. Executing a manipulation can lead to use after free. The identification of this vulnerability is CVE-2016-6885. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in MatrixSSL up to 3.8.3 and classified as problematic. This vulnerability affects the function pstm_exptmod of the component Modular Exponentiation Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect integrity. CVE summarizes:

The pstm_exptmod function in MatrixSSL before 3.8.4 allows remote attackers to cause a denial of service (invalid free and crash) via a base zero value for the modular exponentiation.

The bug was discovered 07/19/2016. The weakness was shared 01/13/2017 (Website). The advisory is available at matrixssl.org. This vulnerability was named CVE-2016-6885 since 08/19/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 178 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 3.8.4 eliminates this vulnerability.

The entries VDB-95315 and VDB-95316 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MatrixSSL 3.8.4

Timelineinfo

07/19/2016 🔍
08/19/2016 +31 days 🔍
01/13/2017 +147 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
05/13/2026 +3405 days 🔍

Sourcesinfo

Advisory: matrixssl.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6885 (🔍)
GCVE (CVE): GCVE-0-2016-6885
GCVE (VulDB): GCVE-100-95314
OSVDB: - CVE-2016-6885 - MatrixSSL - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 01/15/2017 10:37
Updated: 05/13/2026 05:43
Changes: 01/15/2017 10:37 (58), 07/21/2020 16:25 (4), 05/13/2026 05:43 (20)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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