MatrixSSL up to 3.8.5 X.509 Certificate x509FreeExtensions 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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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in MatrixSSL up to 3.8.5. This affects the function x509FreeExtensions of the component X.509 Certificate Handler. Such manipulation leads to use after free. This vulnerability is listed as CVE-2016-6892. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in MatrixSSL up to 3.8.5. It has been rated as problematic. Affected by this issue is the function x509FreeExtensions of the component X.509 Certificate Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. CVE summarizes:

The x509FreeExtensions function in MatrixSSL before 3.8.6 allows remote attackers to cause a denial of service (free of unallocated memory) via a crafted X.509 certificate.

The bug was discovered 10/11/2016. The weakness was presented 01/05/2017 by Craig Young with Tripwire (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2016-6892 since 08/19/2016. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 86 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38643 (MatrixSSL Prior to 3.8.6 Multiple Vulnerabilities).

Upgrading to version 3.8.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 93498†). See VDB-95046 and VDB-95047 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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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OpenVAS ID: 61602
OpenVAS Name: MatrixSSL Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MatrixSSL 3.8.6

Timelineinfo

08/19/2016 🔍
10/10/2016 +52 days 🔍
10/11/2016 +1 days 🔍
01/05/2017 +86 days 🔍
01/05/2017 +0 days 🔍
01/06/2017 +1 days 🔍
11/12/2024 +2867 days 🔍

Sourcesinfo

Product: github.com

Advisory: securityfocus.com⛔
Researcher: Craig Young
Organization: Tripwire
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6892 (🔍)
GCVE (CVE): GCVE-0-2016-6892
GCVE (VulDB): GCVE-100-95048
CERT: 🔍
SecurityFocus: 93498 - MatrixSSL VU#396440 Heap Based Buffer Overflow and Multiple Denial of Service Vulnerabilities
OSVDB: - CVE-2016-6892 - MatrixSSL - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 01/06/2017 09:28
Updated: 11/12/2024 03:47
Changes: 01/06/2017 09:28 (67), 07/14/2020 18:31 (8), 11/12/2024 03:47 (20)
Complete: 🔍
Cache ID: 216:33D:103

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

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