Detections
Analytics

GLSA-201911-01 : OpenSSH: Integer overflow

high Nessus Plugin ID 130633

Language:

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-201911-01 (OpenSSH: Integer overflow)

 OpenSSH, when built with “xmss” USE flag enabled, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key.
 NOTE: This USE flag is disabled by default! Impact :

 A remote attacker could connect to a vulnerable OpenSSH server using a special crafted XMSS key possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
 Workaround :

 Disable XMSS key type.

Solution

All OpenSSH users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/openssh/openssh-8.0_p1-r4'

See Also

https://security.gentoo.org/glsa/201911-01

Plugin Details

Severity: High

ID: 130633

File Name: gentoo_GLSA-201911-01.nasl

Version: 1.4

Type: local

Published: 11/8/2019

Updated: 4/15/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.4

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

CVSS Score Source: CVE-2019-16905

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:openssh, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/7/2019

Vulnerability Publication Date: 10/9/2019

Reference Information

CVE: CVE-2019-16905

GLSA: 201911-01