Linux Distros Unpatched Vulnerability : CVE-2018-15919

medium Nessus Plugin ID 222223

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states 'We understand that the OpenSSH developers do not want to treat such a username enumeration (or oracle) as a vulnerability.' (CVE-2018-15919)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 222223

File Name: unpatched_CVE_2018_15919.nasl

Version: 1.4

Type: local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 9/4/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2018-15919

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:redhat:enterprise_linux:openssh-server, p-cpe:/a:centos:centos:openssh-server-sysvinit, p-cpe:/a:redhat:enterprise_linux:pam_ssh_agent_auth, p-cpe:/a:canonical:ubuntu_linux:openssh-ssh1, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:openssh-cavs, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:openssh-ldap, p-cpe:/a:centos:centos:openssh-server, cpe:/o:centos:centos:7, p-cpe:/a:debian:debian_linux:openssh, p-cpe:/a:centos:centos:openssh, p-cpe:/a:redhat:enterprise_linux:openssh-clients, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:openssh-keycat, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:openssh-keycat, p-cpe:/a:redhat:enterprise_linux:openssh-server-sysvinit, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:openssh, p-cpe:/a:centos:centos:openssh-clients, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:openssh-ldap, p-cpe:/a:redhat:enterprise_linux:openssh-cavs, p-cpe:/a:redhat:enterprise_linux:openssh, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:openssh-askpass, p-cpe:/a:centos:centos:openssh-askpass, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:pam_ssh_agent_auth

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/27/2018

Reference Information

CVE: CVE-2018-15919

Detections

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