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Debian DSA-4280-1 : openssh - security update

medium Nessus Plugin ID 112066

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Synopsis

The remote Debian host is missing a security-related update.

Description

Dariusz Tytko, Michal Sajdak and Qualys Security discovered that OpenSSH, an implementation of the SSH protocol suite, was prone to a user enumeration vulnerability. This would allow a remote attacker to check whether a specific user account existed on the target server.

Solution

Upgrade the openssh packages.

For the stable distribution (stretch), this problem has been fixed in version 1:7.4p1-10+deb9u4.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906236

https://security-tracker.debian.org/tracker/source-package/openssh

https://packages.debian.org/source/stretch/openssh

https://www.debian.org/security/2018/dsa-4280

Plugin Details

Severity: Medium

ID: 112066

File Name: debian_DSA-4280.nasl

Version: 1.6

Type: local

Agent: unix

Published: 8/23/2018

Updated: 4/5/2019

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

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

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.9

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openssh, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/22/2018

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2018-15473

DSA: 4280