Amazon Linux 2 : libssh2 (ALAS-2019-1303)

critical Nessus Plugin ID 129561
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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory. (CVE-2019-3862)

Solution

Run 'yum update libssh2' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2019-1303.html

Plugin Details

Severity: Critical

ID: 129561

File Name: al2_ALAS-2019-1303.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/4/2019

Updated: 12/23/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libssh2, p-cpe:/a:amazon:linux:libssh2-debuginfo, p-cpe:/a:amazon:linux:libssh2-devel, p-cpe:/a:amazon:linux:libssh2-docs, cpe:/o:amazon:linux:2

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/2/2019

Vulnerability Publication Date: 3/21/2019

Reference Information

CVE: CVE-2019-3862

ALAS: 2019-1303