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.
4.2	$0-$5k	0.00

A vulnerability was found in Dropbear SSH up to 2016 (SSH Server Software). It has been classified as problematic. Affected is some unknown functionality of the component dbclient/server. The manipulation of the argument -v with an unknown input leads to a information disclosure vulnerability (Memory). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

The dbclient and server in Dropbear SSH before 2016.74, when compiled with DEBUG_TRACE, allows local users to read process memory via the -v argument, related to a failed remote ident.

The bug was discovered 09/15/2016. The weakness was disclosed 03/03/2017 by Matt Johnston (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-7409 since 09/09/2016. The attack needs to be approached locally. A authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 158 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97266 (GLSA-201702-23 : Dropbear: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38670 (Dropbear SSH Multiple Security Vulnerabilities).

Upgrading to version 2016.74 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 vulnerability database at Tenable (97266). The entries 97509, 97510 and 97511 are pretty similar.

Productinfo

Type

• SSH Server Software

Name

• Dropbear SSH

Version

• 2016

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Memory
Class: Information disclosure / Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

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: 97266
Nessus Name: GLSA-201702-23 : Dropbear: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 803656
OpenVAS Name: Dropbear SSH 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: Dropbear SSH 2016.74

Timelineinfo

09/09/2016 🔍
09/14/2016 +5 days 🔍
09/15/2016 +1 days 🔍
02/20/2017 +158 days 🔍
02/21/2017 +1 days 🔍
03/03/2017 +10 days 🔍
03/03/2017 +0 days 🔍
03/04/2017 +1 days 🔍
09/03/2020 +1279 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Matt Johnston
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7409 (🔍)
SecurityFocus: 92973 - Dropbear SSH CVE-2016-7409 Information Disclosure Vulnerability
OSVDB: - CVE-2016-7409 - Dropbear SSH - Information Disclosure Issue

See also: 🔍

Entryinfo

Created: 03/04/2017 13:46
Updated: 09/03/2020 18:54
Changes: 03/04/2017 13:46 (81), 09/03/2020 18:54 (3)
Complete: 🔍

Discussion

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