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NewStart CGSL CORE 5.05 / MAIN 5.05 : libvncserver Vulnerability (NS-SA-2021-0135)

critical Nessus Plugin ID 154621

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Synopsis

The remote NewStart CGSL host is affected by a vulnerability.

Description

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has libvncserver packages installed that are affected by a vulnerability:

 - It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow. (CVE-2017-18922)

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

Solution

Upgrade the vulnerable CGSL libvncserver packages. Note that updated packages may not be available yet. Please contact ZTE for more information.

See Also

http://security.gd-linux.com/notice/NS-SA-2021-0135

http://security.gd-linux.com/info/CVE-2017-18922

Plugin Details

Severity: Critical

ID: 154621

File Name: newstart_cgsl_NS-SA-2021-0135_libvncserver.nasl

Version: 1.2

Type: local

Published: 10/28/2021

Updated: 10/28/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2017-18922

CVSS v3

Risk Factor: Critical

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: p-cpe:/a:zte:cgsl_core:libvncserver-debuginfo, p-cpe:/a:zte:cgsl_main:libvncserver, p-cpe:/a:zte:cgsl_main:libvncserver-devel, cpe:/o:zte:cgsl_main:5, cpe:/o:zte:cgsl_core:5, p-cpe:/a:zte:cgsl_main:libvncserver-debuginfo, p-cpe:/a:zte:cgsl_core:libvncserver, p-cpe:/a:zte:cgsl_core:libvncserver-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2021

Vulnerability Publication Date: 6/30/2020

Reference Information

CVE: CVE-2017-18922