Detections
Analytics

Oracle Linux 6 : openssh (ELSA-2023-4428)

critical Nessus Plugin ID 179850

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-4428 advisory.

 - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009. (CVE-2023-38408)

 - sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.
 (CVE-2016-6210)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2023-4428.html

Plugin Details

Severity: Critical

ID: 179850

File Name: oraclelinux_ELSA-2023-4428.nasl

Version: 1.1

Type: local

Agent: unix

Published: 8/15/2023

Updated: 12/22/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2016-6210

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2023-38408

Vulnerability Information

CPE: cpe:/o:oracle:linux:6, p-cpe:/a:oracle:linux:openssh-clients, p-cpe:/a:oracle:linux:openssh, p-cpe:/a:oracle:linux:openssh-askpass, p-cpe:/a:oracle:linux:openssh-ldap, p-cpe:/a:oracle:linux:openssh-server, p-cpe:/a:oracle:linux:pam_ssh_agent_auth, cpe:/a:oracle:linux:6:10:els

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/11/2023

Vulnerability Publication Date: 7/14/2016

Reference Information

CVE: CVE-2016-6210, CVE-2023-38408

IAVA: 2023-A-0377-S