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Ubuntu 18.10 : libssh vulnerability (USN-3795-2)

critical Nessus Plugin ID 118325

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Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

USN-3795-1 fixed a vulnerability in libssh. This update provides the corresponding update for Ubuntu 18.10.

Peter Winter-Smith discovered that libssh incorrectly handled authentication when being used as a server. A remote attacker could use this issue to bypass authentication without any credentials.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libssh-4 package.

See Also

https://usn.ubuntu.com/3795-2/

Plugin Details

Severity: Critical

ID: 118325

File Name: ubuntu_USN-3795-2.nasl

Version: 1.10

Type: local

Agent: unix

Published: 10/23/2018

Updated: 7/29/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2018-10933

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libssh-4, cpe:/o:canonical:ubuntu_linux:18.10

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/22/2018

Vulnerability Publication Date: 10/17/2018

Reference Information

CVE: CVE-2018-10933

IAVA: 2018-A-0347-S

USN: 3795-2