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Ubuntu 16.04 ESM : libssh2 vulnerabilities (USN-5308-1)

critical Nessus Plugin ID 183694

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Synopsis

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

Description

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5308-1 advisory.

 It was discovered that libssh2 mishandled certain input. If libssh2 were used to connect to a malicious or compromised SSH server, a remote, unauthenticated attacker could possibly execute arbitrary code on the client

 system. (CVE-2019-3855)

 It was discovered that libssh2 incorrectly handled prompt requests. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2019-3856)

 It was discovered that libssh2 incorrectly handled SSH_MSG_CHANNEL_REQUEST packets. A remote attacker could possibly use this issue to execute arbitrary code, cause a denial of service, or obtain sensitive information.

 (CVE-2019-3857, CVE-2019-3862)

 It was discovered that libssh2 incorrectly handled specially crafted SFTP packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3858)

 It was discovered that libssh2 incorrectly handled certain specially crafted packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
 (CVE-2019-3859)

 It was discovered that libssh2 incorrectly handled SFTP packets with empty payloads. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
 (CVE-2019-3860)

 It was discovered that libssh2 incorrectly handled padding values in SSH packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3861)

 It was discovered that libssh2 incorrectly handled interactive response messages length. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2019-3863)

 It was discovered that libssh2 incorrectly handled the Diffie Hellman key exchange. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
 (CVE-2019-13115)

 It was discovered that libssh2 incorrectly handled bound checks in SSH_MSG_DISCONNECT. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
 (CVE-2019-17498)

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 libssh2-1 and / or libssh2-1-dev packages.

See Also

https://ubuntu.com/security/notices/USN-5308-1

Plugin Details

Severity: Critical

ID: 183694

File Name: ubuntu_USN-5308-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/23/2023

Updated: 8/27/2024

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: High

Base Score: 9.3

Temporal Score: 7.3

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

CVSS Score Source: CVE-2019-3855

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:N/A:H

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

CVSS Score Source: CVE-2019-3862

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libssh2-1, cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:libssh2-1-dev

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: 3/7/2022

Vulnerability Publication Date: 3/18/2019

Reference Information

CVE: CVE-2019-13115, CVE-2019-17498, CVE-2019-3855, CVE-2019-3856, CVE-2019-3857, CVE-2019-3858, CVE-2019-3859, CVE-2019-3860, CVE-2019-3861, CVE-2019-3862, CVE-2019-3863

USN: 5308-1