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.
5.1	$0-$5k	0.00

A vulnerability was found in OpenSSL up to 1.0.2j/1.1.0c on x64 (Network Encryption Software). It has been rated as problematic. Affected by this issue is the function BN_mod_exp of the component RSA/DSA/DH. The manipulation with an unknown input leads to a information disclosure vulnerability (Private Key). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability.

The bug was discovered 01/26/2017. The weakness was presented 01/26/2017 by OSS-Fuzz as 20170126.txt as confirmed security advisory (Website). The advisory is available at openssl.org. The public release was coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2017-3732 since 12/16/2016. The exploitation is known to be difficult. The attack may be launched remotely. The requirement for exploitation is a simple authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project. The advisory points out:

There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 99212 (openSUSE Security Update : nodejs4 (openSUSE-2017-442)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371180 (IBM Java SDK Multiple Vulnerabilities (Oracle July 17 2018 CPU (1.6.0_201, 1.7.0_191, 1.8.0_181))).

Upgrading to version 1.0.2k or 1.1.0d eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99212). mta.openssl.org is providing further details. See 68431, 81142, 82682 and 83122 for similar entries.

Not Affected

• OpenSSL up to 1.0.2

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.0.2
• 1.0.2a
• 1.0.2b
• 1.0.2c
• 1.0.2d
• 1.0.2e
• 1.0.2f
• 1.0.2g
• 1.0.2h
• 1.0.2i
• 1.0.2j
• 1.1.0
• 1.1.0a
• 1.1.0b
• 1.1.0c

License

• open-source

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Private Key
Class: Information disclosure / Private Key
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 99212
Nessus Name: openSUSE Security Update : nodejs4 (openSUSE-2017-442)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800325
OpenVAS Name: F5 BIG-IP - OpenSSL vulnerability CVE-2017-3732
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSSL 1.0.2k/1.1.0d
Patch: github.com

Timelineinfo

12/16/2016 🔍
01/15/2017 +30 days 🔍
01/26/2017 +11 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/27/2017 +1 days 🔍
04/06/2017 +69 days 🔍
05/04/2017 +28 days 🔍
11/04/2022 +2010 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 20170126.txt
Researcher: OSS-Fuzz
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2017-3732 (🔍)
OVAL: 🔍

SecurityTracker: 1037717
SecurityFocus: 95814 - OpenSSL CVE-2017-3732 Information Disclosure Vulnerability
OSVDB: - CVE-2017-3732 - OpenSSL - Denial of Service Issue

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 01/27/2017 08:16
Updated: 11/04/2022 09:50
Changes: 01/27/2017 08:16 (82), 08/04/2020 18:07 (17), 11/04/2022 09:50 (4)
Complete: 🔍

Discussion

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