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Debian DLA-1991-1 : libssh2 security update

high Nessus Plugin ID 130980

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Synopsis

The remote Debian host is missing a security update.

Description

In libssh2, SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server

For Debian 8 'Jessie', this problem has been fixed in version 1.4.3-4.1+deb8u6.

We recommend that you upgrade your libssh2 packages.

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

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html

https://packages.debian.org/source/jessie/libssh2

Plugin Details

Severity: High

ID: 130980

File Name: debian_DLA-1991.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/14/2019

Updated: 4/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

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

CVSS Score Source: CVE-2019-17498

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libssh2-1, p-cpe:/a:debian:debian_linux:libssh2-1-dbg, p-cpe:/a:debian:debian_linux:libssh2-1-dev, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/13/2019

Vulnerability Publication Date: 10/21/2019

Reference Information

CVE: CVE-2019-17498