libssh up to 0.7.2 information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in libssh up to 0.7.2. This impacts an unknown function. Such manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2016-0739. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in libssh up to 0.7.2. It has been rated as critical. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a information disclosure vulnerability. 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. CVE summarizes:

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

The weakness was disclosed 04/13/2016 with Red Hat (Website). The advisory is available at lists.fedoraproject.org. This vulnerability is handled as CVE-2016-0739 since 12/16/2015. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 88913 (Debian DLA-425-1 : libssh security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175641 (Debian Security Update for libssh (DSA 3488-1)).

Upgrading to version 0.7.3 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 (88913), SecurityFocus (BID 83186†) and Vulnerability Center (SBV-57867†). The entries VDB-73428 and VDB-82308 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 88913
Nessus Name: Debian DLA-425-1 : libssh security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for libssh USN-2912-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libssh 0.7.3

Timelineinfo

12/16/2015 🔍
02/23/2016 +69 days 🔍
02/23/2016 +0 days 🔍
02/23/2016 +0 days 🔍
02/24/2016 +1 days 🔍
04/03/2016 +39 days 🔍
04/13/2016 +9 days 🔍
04/13/2016 +0 days 🔍
04/14/2016 +1 days 🔍
07/24/2022 +2292 days 🔍

Sourcesinfo

Advisory: USN-2912-1
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-0739 (🔍)
GCVE (CVE): GCVE-0-2016-0739
GCVE (VulDB): GCVE-100-82322
SecurityFocus: 83186 - libssh CVE-2016-0739 Security Bypass Vulnerability
Vulnerability Center: 57867 - libssh 0.1 - 0.7.2 Remote Weak Encryption in Diffie-Hellman Secret Key Generation, Medium

See also: 🔍

Entryinfo

Created: 04/14/2016 09:58
Updated: 07/24/2022 10:56
Changes: 04/14/2016 09:58 (69), 02/03/2019 10:35 (14), 07/24/2022 10:49 (4), 07/24/2022 10:56 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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