RHEL 8 : libvncserver (RHSA-2020:0920)

High Nessus Plugin ID 143006

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VPR Score: 7.4

Synopsis

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

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:0920 advisory.

- libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow (CVE-2019-15690)

- libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap- based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
(CVE-2019-20788)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected libvncserver, libvncserver-debugsource and / or libvncserver-devel packages.

See Also

https://cwe.mitre.org/data/definitions/122.html

https://cwe.mitre.org/data/definitions/190.html

https://access.redhat.com/security/cve/CVE-2019-15690

https://access.redhat.com/security/cve/CVE-2019-20788

https://access.redhat.com/errata/RHSA-2020:0920

https://bugzilla.redhat.com/1811948

Plugin Details

Severity: High

ID: 143006

File Name: redhat-RHSA-2020-0920.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2020/11/18

Updated: 2020/11/19

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 7.4

CVSS Score Source: CVE-2019-20788

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_aus:8.2, cpe:/o:redhat:rhel_e4s:8.1, cpe:/o:redhat:rhel_e4s:8.2, cpe:/o:redhat:rhel_eus:8.1, cpe:/o:redhat:rhel_eus:8.2, cpe:/o:redhat:rhel_eus:8.4, cpe:/o:redhat:rhel_tus:8.2, cpe:/a:redhat:enterprise_linux:8::appstream, cpe:/a:redhat:enterprise_linux:8::crb, cpe:/a:redhat:rhel_aus:8.2::appstream, cpe:/a:redhat:rhel_aus:8.2::crb, cpe:/a:redhat:rhel_e4s:8.1::appstream, cpe:/a:redhat:rhel_e4s:8.1::crb, cpe:/a:redhat:rhel_e4s:8.2::appstream, cpe:/a:redhat:rhel_e4s:8.2::crb, cpe:/a:redhat:rhel_eus:8.1::appstream, cpe:/a:redhat:rhel_eus:8.1::crb, cpe:/a:redhat:rhel_eus:8.2::appstream, cpe:/a:redhat:rhel_eus:8.2::crb, cpe:/a:redhat:rhel_eus:8.4::appstream, cpe:/a:redhat:rhel_eus:8.4::crb, cpe:/a:redhat:rhel_tus:8.2::appstream, cpe:/a:redhat:rhel_tus:8.2::crb, p-cpe:/a:redhat:enterprise_linux:libvncserver, p-cpe:/a:redhat:enterprise_linux:libvncserver-debugsource, p-cpe:/a:redhat:enterprise_linux:libvncserver-devel

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: 2020/03/23

Vulnerability Publication Date: 2020/03/23

Reference Information

CVE: CVE-2019-15690, CVE-2019-20788

RHSA: 2020:0920

CWE: 122, 190