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Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : libssh vulnerabilities (USN-6138-1)

medium Nessus Plugin ID 176712

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6138-1 advisory.

 Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667)

 Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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://ubuntu.com/security/notices/USN-6138-1

Plugin Details

Severity: Medium

ID: 176712

File Name: ubuntu_USN-6138-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 6/5/2023

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

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-2023-2283

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libssh-gcrypt-4, cpe:/o:canonical:ubuntu_linux:23.04, p-cpe:/a:canonical:ubuntu_linux:libssh-4, p-cpe:/a:canonical:ubuntu_linux:libssh-gcrypt-dev, p-cpe:/a:canonical:ubuntu_linux:libssh-dev, cpe:/o:canonical:ubuntu_linux:20.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/5/2023

Vulnerability Publication Date: 5/11/2023

Reference Information

CVE: CVE-2023-1667, CVE-2023-2283

IAVA: 2023-A-0517-S

USN: 6138-1