SUSE SLES12 Security Update : tigervnc (SUSE-SU-2020:0266-1)

medium Nessus Plugin ID 133395
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VPR Score: 5.9

Synopsis

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

Description

This update for tigervnc provides the following fixes :

Security issues fixed :

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).

Non-security issue fixed :

Make sure CN in generated certificate doesn't exceed 64 characters.
(bnc#1041847)

Change with-vnc-key.sh to generate TLS certificate using current hostname to keep it short. (bsc#1041847)

Disable MIT-SHM extension when running under user 'vnc'. (bsc#1053373)

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 for SAP 12-SP1 :

zypper in -t patch SUSE-SLE-SAP-12-SP1-2020-266=1

SUSE Linux Enterprise Server 12-SP1-LTSS :

zypper in -t patch SUSE-SLE-SERVER-12-SP1-2020-266=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=1041847

https://bugzilla.suse.com/show_bug.cgi?id=1053373

http://www.nessus.org/u?44600ecc

Plugin Details

Severity: Medium

ID: 133395

File Name: suse_SU-2020-0266-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/31/2020

Updated: 2/4/2020

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 5.9

CVSS v2.0

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 v3.0

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:*:*:*:*:*:*:*

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: 1/30/2020

Vulnerability Publication Date: 12/26/2019

Reference Information

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