RHEL 7 : libssh2 (RHSA-2019:1943)

high Nessus Plugin ID 127630

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Synopsis

The remote Red Hat host is missing one or more security updates for libssh2.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:1943 advisory.

The libssh2 packages provide a library that implements the SSH2 protocol.

Security Fix(es):

* libssh2: Integer overflow in transport read resulting in out of bounds write (CVE-2019-3855)

* libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write (CVE-2019-3856)

* libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write (CVE-2019-3857)

* libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes (CVE-2019-3863)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RHEL libssh2 package based on the guidance in RHSA-2019:1943.

Plugin Details

Severity: High

ID: 127630

File Name: redhat-RHSA-2019-1943.nasl

Version: 1.7

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 8/12/2019

Updated: 11/6/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

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-2019-3855

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

CVSS Score Source: CVE-2019-3863

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libssh2, cpe:/o:redhat:rhel_eus:7.4, p-cpe:/a:redhat:enterprise_linux:libssh2-devel, p-cpe:/a:redhat:enterprise_linux:libssh2-docs

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2019

Vulnerability Publication Date: 3/21/2019

Reference Information

CVE: CVE-2019-3855, CVE-2019-3856, CVE-2019-3857, CVE-2019-3863

CWE: 787

RHSA: 2019:1943

Detections

Analytics