VDB-74413 · CVE-2015-1782 · BID 73061

Libssh2 up to 1.4.2 Service kex_agree_methods input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

A vulnerability classified as critical was found in Libssh2 up to 1.4.2. Affected by this vulnerability is the function kex_agree_methods of the component Service. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The kex_agree_methods function in libssh2 before 1.5.0 allows remote servers to cause a denial of service (crash) or have other unspecified impact via crafted length values in an SSH_MSG_KEXINIT packet.

The weakness was presented 03/13/2015 (Website). The advisory is shared at libssh2.org. This vulnerability is known as CVE-2015-1782 since 02/17/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 82156 (Debian DLA-171-1 : libssh2 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.

Upgrading to version 1.4.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (82156).

Productinfo

Name

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: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 82156
Nessus Name: Debian DLA-171-1 : libssh2 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 800487
OpenVAS Name: Fedora Update for libssh2 FEDORA-2015-3797
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libssh2 1.4.3

Timelineinfo

02/17/2015 🔍
03/11/2015 +22 days 🔍
03/12/2015 +1 days 🔍
03/13/2015 +1 days 🔍
03/13/2015 +0 days 🔍
03/22/2015 +9 days 🔍
03/26/2015 +4 days 🔍
03/30/2015 +4 days 🔍
05/01/2022 +2589 days 🔍

Sourcesinfo

Advisory: libssh2.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-1782 (🔍)
OVAL: 🔍

Vulnerability Center: 49172 - Libssh2 before 1.5.0 Remote DoS or Other Unspecified Imapct via Crafted SSH_MSG_KEXINIT Packet, Medium
SecurityFocus: 73061 - libssh2 'kex_agree_methods()' Function Out of Bounds Denial of Service Vulnerability

Entryinfo

Created: 03/30/2015 12:36
Updated: 05/01/2022 12:52
Changes: 03/30/2015 12:36 (60), 06/23/2017 10:31 (10), 05/01/2022 12:52 (3)
Complete: 🔍

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