NewStart CGSL CORE 5.05 / MAIN 5.05 : libX11 Vulnerability (NS-SA-2022-0042)

critical Nessus Plugin ID 160836

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 libX11 packages installed that are affected by a vulnerability:

- LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session. (CVE-2021-31535)

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 libX11 packages. Note that updated packages may not be available yet. Please contact ZTE for more information.

Plugin Details

Severity: Critical

ID: 160836

File Name: newstart_cgsl_NS-SA-2022-0042_libX11.nasl

Version: 1.3

Type: local

Family: NewStart CGSL Local Security Checks

Published: 5/10/2022

Updated: 5/10/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2021-31535

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:zte:cgsl_core:libx11, p-cpe:/a:zte:cgsl_core:libx11-common, p-cpe:/a:zte:cgsl_core:libx11-debuginfo, p-cpe:/a:zte:cgsl_core:libx11-devel, p-cpe:/a:zte:cgsl_main:libx11, p-cpe:/a:zte:cgsl_main:libx11-common, p-cpe:/a:zte:cgsl_main:libx11-debuginfo, p-cpe:/a:zte:cgsl_main:libx11-devel, cpe:/o:zte:cgsl_core:5, cpe:/o:zte:cgsl_main:5

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/8/2022

Vulnerability Publication Date: 5/27/2021

Reference Information

CVE: CVE-2021-31535

Detections

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