OpenSSL up to 0.9.8/1.0.0q/1.0.1l/1.0.2 SSLv2 s2_srvr.c get_client_master_key CLIENT-MASTER-KEY CLEAR-KEY-LENGTH information disclosure

entryeditHistoryDiffjsonxmlCTI
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.
5.2$0-$5k0.00

A vulnerability, which was classified as critical, was found in OpenSSL up to 0.9.8/1.0.0q/1.0.1l/1.0.2 (Network Encryption Software). Affected is the function get_client_master_key of the file s2_srvr.c of the component SSLv2 Handler. The manipulation of the argument CLIENT-MASTER-KEY CLEAR-KEY-LENGTH with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 03/02/2016 by Alex with University of Michigan (Website). The advisory is available at git.openssl.org. This vulnerability is traded as CVE-2016-0703 since 12/16/2015. 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.

The vulnerability scanner Nessus provides a plugin with the ID 82783 (CentOS 5 : openssl (CESA-2015:0800) (FREAK)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350021 (Amazon Linux Security Advisory for openssl098e: ALAS-2016-682).

Upgrading to version 0.9.8zf, 1.0.0r, 1.0.1m or 1.0.2a 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 SecurityFocus (BID 83743), X-Force (111145), Vulnerability Center (SBV-56994) and Tenable (82783). See 68520, 74747, 81112 and 81139 for similar entries.

Productinfoedit

Type

Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2infoedit

AVACAuCIA
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfoedit

Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 82783
Nessus Name: CentOS 5 : openssl (CESA-2015:0800) (FREAK)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-682
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 0.9.8zf/1.0.0r/1.0.1m/1.0.2a

Timelineinfoedit

04/14/2015 🔍
04/15/2015 +1 days 🔍
12/16/2015 +245 days 🔍
02/29/2016 +75 days 🔍
03/01/2016 +1 days 🔍
03/02/2016 +0 days 🔍
03/02/2016 +0 days 🔍
03/03/2016 +1 days 🔍
03/05/2016 +2 days 🔍
02/13/2017 +345 days 🔍
09/01/2018 +564 days 🔍

Sourcesinfoedit

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

Advisory: git.openssl.org
Researcher: Alex
Organization: University of Michigan
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0703 (🔍)
OVAL: 🔍

SecurityFocus: 83743 - OpenSSL CVE-2016-0703 Information Disclosure Vulnerability
X-Force: 111145 - OpenSSL s2_srvr.c security bypass
Vulnerability Center: 56994 - OpenSSL Remote Session Key Recovery in SSLv2 - CVE-2016-0703, Medium

See also: 🔍

Entryinfoedit

Created: 03/03/2016 10:19 AM
Updated: 09/01/2018 08:38 AM
Changes: (25) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_vuldb_av vulnerability_cvss3_vuldb_ac vulnerability_cvss3_vuldb_pr vulnerability_cvss3_vuldb_ui vulnerability_cvss3_vuldb_s vulnerability_cvss3_vuldb_c vulnerability_cvss3_vuldb_i vulnerability_cvss3_vuldb_a advisory_person_nickname advisory_company_name advisory_confirm_url countermeasure_date source_oval_id source_securityfocus_date source_securityfocus_class source_openvas_id source_openvas_filename source_openvas_title source_openvas_family
Complete: 🔍

Comments

No comments yet. Please log in to comment.

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!