SUSE SLED15 / SLES15 Security Update : LibVNCServer (SUSE-SU-2020:1922-1)

critical Nessus Plugin ID 138548

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for LibVNCServer fixes the following issues :

security update

added patches fix CVE-2018-21247 [bsc#1173874], uninitialized memory contents are vulnerable to Information leak

+ LibVNCServer-CVE-2018-21247.patch fix CVE-2019-20839 [bsc#1173875], buffer overflow in ConnectClientToUnixSock()

+ LibVNCServer-CVE-2019-20839.patch fix CVE-2019-20840 [bsc#1173876], unaligned accesses in hybiReadAndDecode can lead to denial of service

+ LibVNCServer-CVE-2019-20840.patch fix CVE-2020-14398 [bsc#1173880], improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c

+ LibVNCServer-CVE-2020-14398.patch fix CVE-2020-14397 [bsc#1173700], NULL pointer dereference in libvncserver/rfbregion.c

+ LibVNCServer-CVE-2020-14397.patch fix CVE-2020-14399 [bsc#1173743], Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c.

+ LibVNCServer-CVE-2020-14399.patch fix CVE-2020-14400 [bsc#1173691], Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c.

+ LibVNCServer-CVE-2020-14400.patch fix CVE-2020-14401 [bsc#1173694], potential integer overflows in libvncserver/scale.c

+ LibVNCServer-CVE-2020-14401.patch fix CVE-2020-14402 [bsc#1173701], out-of-bounds access via encodings.

+ LibVNCServer-CVE-2020-14402,14403,14404.patch fix CVE-2017-18922 [bsc#1173477], preauth buffer overwrite

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

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Workstation Extension 15-SP2 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP2-2020-1922=1

SUSE Linux Enterprise Workstation Extension 15-SP1 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP1-2020-1922=1

SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP2-2020-1922=1

SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP1-2020-1922=1

Plugin Details

Severity: Critical

ID: 138548

File Name: suse_SU-2020-1922-1.nasl

Version: 1.3

Type: local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/16/2020

Updated: 3/1/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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:novell:suse_linux:libvncserver0-debuginfo, p-cpe:/a:novell:suse_linux:libvncserver-debugsource, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:libvncserver0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/15/2020

Vulnerability Publication Date: 6/17/2020

Reference Information

CVE: CVE-2017-18922, CVE-2018-21247, CVE-2019-20839, CVE-2019-20840, CVE-2020-14397, CVE-2020-14398, CVE-2020-14399, CVE-2020-14400, CVE-2020-14401, CVE-2020-14402

Detections

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