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Amazon Linux 2 : libssh2 (ALAS-2019-1263)

critical Nessus Plugin ID 127465

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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 when a specially crafted SFTP packet is received from the server. 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-2019-3858)

An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length 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-2019-3861)

Solution

Run 'yum update libssh2' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2019-1263.html

Plugin Details

Severity: Critical

ID: 127465

File Name: al2_ALAS-2019-1263.nasl

Version: 1.3

Type: local

Agent: unix

Published: 8/12/2019

Updated: 5/7/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2019-3861

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/9/2019

Vulnerability Publication Date: 3/21/2019

Reference Information

CVE: CVE-2019-3858, CVE-2019-3861

ALAS: 2019-1263