Detections
Analytics

libssh2 < 1.8.1 Integer Overflow Vulnerability.

high Nessus Plugin ID 135851

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Synopsis

The libssh2 version running on the remote host is affected by an integer overflow vulnerability.

Description

An integer overflow condition exists in libssh2 before 1.8.1 due to the way packets are read from the server. An authenticated, local attacker can exploit this if they have already compromised an SSH server. The attacker may be able to execute code on the system of users who connect to the SSH server.

Solution

Upgrade to libssh2 version 1.8.1 or later.

See Also

https://www.libssh2.org/CVE-2019-3855.html

Plugin Details

Severity: High

ID: 135851

File Name: macosx_libssh2_cve_2019_3855.nasl

Version: 1.2

Type: local

Agent: macosx

Published: 4/21/2020

Updated: 4/23/2020

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2019-3855

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a::libssh2

Required KB Items: Host/MacOSX/Version, Host/MacOSX/packages

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2019

Vulnerability Publication Date: 12/3/2018

Reference Information

CVE: CVE-2019-3855

BID: 107485