SUSE SLES12 Security Update : tigervnc (SUSE-SU-2020:1749-1)

high Nessus Plugin ID 138296
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

This update for tigervnc fixes the following issues :

CVE-2019-15691: Fixed a use-after-return due to incorrect usage of stack memory in ZRLEDecoder (bsc#1159856).

CVE-2019-15692: Fixed a heap-based buffer overflow in CopyRectDecode (bsc#1160250).

CVE-2019-15693: Fixed a heap-based buffer overflow in TightDecoder::FilterGradient (bsc#1159858).

CVE-2019-15694: Fixed a heap-based buffer overflow, caused by improper error handling in processing MemOutStream (bsc#1160251).

CVE-2019-15695: Fixed a stack-based buffer overflow, which could be triggered from CMsgReader::readSetCursor (bsc#1159860).

Other bugs fixed :

Fix random connection freezes (bsc#1169952, bsc#1160249, bsc#1165680) :

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 Server 12-SP5 :

zypper in -t patch SUSE-SLE-SERVER-12-SP5-2020-1749=1

SUSE Linux Enterprise Server 12-SP4 :

zypper in -t patch SUSE-SLE-SERVER-12-SP4-2020-1749=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1159856

https://bugzilla.suse.com/show_bug.cgi?id=1159858

https://bugzilla.suse.com/show_bug.cgi?id=1159860

https://bugzilla.suse.com/show_bug.cgi?id=1160250

https://bugzilla.suse.com/show_bug.cgi?id=1160251

https://www.suse.com/security/cve/CVE-2019-15691/

https://www.suse.com/security/cve/CVE-2019-15692/

https://www.suse.com/security/cve/CVE-2019-15693/

https://www.suse.com/security/cve/CVE-2019-15694/

https://www.suse.com/security/cve/CVE-2019-15695/

https://bugzilla.suse.com/show_bug.cgi?id=1160937

https://bugzilla.suse.com/show_bug.cgi?id=1160249

https://bugzilla.suse.com/show_bug.cgi?id=1165680

https://bugzilla.suse.com/show_bug.cgi?id=1169952

http://www.nessus.org/u?6652839f

Plugin Details

Severity: High

ID: 138296

File Name: suse_SU-2020-1749-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 7/9/2020

Updated: 7/14/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

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

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:2.3:o:novell:suse_linux:12:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:tigervnc:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:tigervnc-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:tigervnc-debugsource:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:xorg-x11-xvnc:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:xorg-x11-xvnc-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:libxvnc1:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:libxvnc1-debuginfo:*:*:*:*:*:*:*

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: 6/25/2020

Vulnerability Publication Date: 12/26/2019

Reference Information

CVE: CVE-2019-15693, CVE-2019-15692, CVE-2019-15691, CVE-2019-15694, CVE-2019-15695