OpenSSL up to 1.1.0 State-Machine statem/statem.c TLS Message resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in OpenSSL up to 1.1.0. Affected by this vulnerability is an unknown functionality in the library statem/statem_lib.c of the file statem/statem.c of the component State-Machine. The manipulation as part of TLS Message results in resource consumption. This vulnerability is reported as CVE-2016-6307. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenSSL up to 1.1.0 (Network Encryption Software). It has been classified as problematic. Affected is an unknown code block in the library statem/statem_lib.c of the file statem/statem.c of the component State-Machine. The manipulation as part of a TLS Message leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

The state-machine implementation in OpenSSL 1.1.0 before 1.1.0a allocates memory before checking for an excessive length, which might allow remote attackers to cause a denial of service (memory consumption) via crafted TLS messages, related to statem/statem.c and statem/statem_lib.c.

The bug was discovered 09/22/2016. The weakness was disclosed 09/26/2016 by Shi Lei with Qihoo 360 (Website). The advisory is available at kb.juniper.net. This vulnerability is traded as CVE-2016-6307 since 07/26/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 93816 (OpenSSL 1.1.0 < 1.1.0a Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316384 (Cisco Unity Express OpenSSL Multiple Vulnerabilities (cisco-sa-20160927-openssl)).

Upgrading to version 1.1.0a eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (93816) and SecurityFocus (BID 93152†). The entries VDB-87879, VDB-88080, VDB-90396 and VDB-90937 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
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: Resource consumption
CWE: CWE-400 / CWE-404
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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Nessus ID: 93816
Nessus Name: OpenSSL 1.1.0 < 1.1.0a Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 100026
OpenVAS Name: Junos Multiple OpenSSL 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: OpenSSL 1.1.0a
Patch: 4b390b6c3f8df925dc92a3dd6b022baa9a2f4650

Timelineinfo

07/26/2016 🔍
09/21/2016 +57 days 🔍
09/22/2016 +1 days 🔍
09/22/2016 +0 days 🔍
09/26/2016 +4 days 🔍
09/26/2016 +0 days 🔍
09/27/2016 +1 days 🔍
09/30/2016 +3 days 🔍
09/21/2022 +2182 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: kb.juniper.net
Researcher: Shi Lei
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6307 (🔍)
GCVE (CVE): GCVE-0-2016-6307
GCVE (VulDB): GCVE-100-92202

OVAL: 🔍

SecurityFocus: 93152 - OpenSSL CVE-2016-6307 Denial of Service Vulnerability
SecurityTracker: 1036885

See also: 🔍

Entryinfo

Created: 09/27/2016 10:49
Updated: 09/21/2022 13:53
Changes: 09/27/2016 10:49 (76), 07/07/2019 17:18 (10), 09/21/2022 13:53 (5)
Complete: 🔍
Cache ID: 216:0A7:103

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