Debian dla-3437 : libssh-4 - security update

high Nessus Plugin ID 176464

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3437 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-3437-1 [email protected] https://www.debian.org/lts/security/ Tobias Frost May 29, 2023 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : libssh Version : 0.8.7-1+deb10u2 CVE ID : CVE-2019-14889 CVE-2023-1667 Debian Bug : 946548 1035832

Two security issues have been discovered in libssh, a tiny C SSH library, which may allows an remote authenticated user to cause a denial of service or inject arbitrary commands.

CVE-2019-14889

A flaw was found with the libssh API function ssh_scp_new() in versions before 0.9.3 and before 0.8.8. When the libssh SCP client connects to a server, the scp command, which includes a user-provided path, is executed on the server-side. In case the library is used in a way where users can influence the third parameter of the function, it would become possible for an attacker to inject arbitrary commands, leading to a compromise of the remote target.

CVE-2023-1667

A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.

For Debian 10 buster, these problems have been fixed in version 0.8.7-1+deb10u2.

We recommend that you upgrade your libssh packages.

For the detailed security status of libssh please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libssh

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the libssh-4 packages.

Plugin Details

Severity: High

ID: 176464

File Name: debian_DLA-3437.nasl

Version: 1.4

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/30/2023

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2019-14889

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libssh-gcrypt-4, p-cpe:/a:debian:debian_linux:libssh-doc, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libssh-gcrypt-dev, p-cpe:/a:debian:debian_linux:libssh-dev, p-cpe:/a:debian:debian_linux:libssh-4

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/29/2023

Vulnerability Publication Date: 12/10/2019

Reference Information

CVE: CVE-2019-14889, CVE-2023-1667

IAVA: 2023-A-0517-S

Detections

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