Bug 1120121 – VUL-0: CVE-2018-20024: LibVNCServer: NULL pointer dereference in VNC client code allows for denial of service

Bug 1120121 - (CVE-2018-20024) VUL-0: CVE-2018-20024: LibVNCServer: NULL pointer dereference in VNC client code allows for denial of service

(CVE-2018-20024)
Summary:	VUL-0: CVE-2018-20024: LibVNCServer: NULL pointer dereference in VNC client c...

Status:	RESOLVED FIXED

Classification:	Novell Products
Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents
Version:	unspecified
Hardware:	Other Other

Priority:	P3 - Medium Severity: Normal
Target Milestone:	---
Assigned To:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/221459/
Whiteboard:	CVSSv3:RedHat:CVE-2018-20024:6.5:(AV:...
Keywords:

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Reported:	2018-12-20 17:56 UTC by Alexander Bergmann
Modified:	2019-04-29 10:16 UTC (History)
CC List:	2 users (show)

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Found By:	Security Response Team
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Blocker:	---
Marketing QA Status:	---
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Description Alexander Bergmann 2018-12-20 17:56:18 UTC

rh#1661132 / CVE-2018-20024

LibVNC before commit 4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7 contains null pointer dereference in VNC client code that can result DoS.

External Reference:
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-034-libvnc-null-pointer-dereference/

Upstream Patch:
https://github.com/LibVNC/libvncserver/commit/4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1661132
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20024
http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-20024.html

Comment 1 Alexander Bergmann 2018-12-20 17:58:24 UTC

openSUSE x11vnc is also affected.

Comment 2 Petr Gajdos 2019-01-03 16:36:56 UTC

Submitted also to devel project as 0.9.12 is not out yet (sr#662702).

I believe all fixed.

Comment 4 Swamp Workflow Management 2019-01-10 20:10:50 UTC

SUSE-SU-2019:0060-1: An update that fixes 9 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120119,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20023,CVE-2018-20024,CVE-2018-6307
Sources used:
SUSE OpenStack Cloud 7 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Software Development Kit 12-SP4 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Software Development Kit 12-SP3 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server for SAP 12-SP2 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-SP4 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-SP3 (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-SP2-LTSS (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-SP2-BCL (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-SP1-LTSS (src):    LibVNCServer-0.9.9-17.8.1
SUSE Linux Enterprise Server 12-LTSS (src):    LibVNCServer-0.9.9-17.8.1
SUSE Enterprise Storage 4 (src):    LibVNCServer-0.9.9-17.8.1

Comment 5 Swamp Workflow Management 2019-01-11 14:10:24 UTC

SUSE-SU-2019:13927-1: An update that fixes 8 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20024,CVE-2018-6307
Sources used:
SUSE Linux Enterprise Software Development Kit 11-SP4 (src):    LibVNCServer-0.9.1-160.6.1
SUSE Linux Enterprise Server 11-SP4 (src):    LibVNCServer-0.9.1-160.6.1
SUSE Linux Enterprise Server 11-SP3-LTSS (src):    LibVNCServer-0.9.1-160.6.1
SUSE Linux Enterprise Point of Sale 11-SP3 (src):    LibVNCServer-0.9.1-160.6.1
SUSE Linux Enterprise Debuginfo 11-SP4 (src):    LibVNCServer-0.9.1-160.6.1
SUSE Linux Enterprise Debuginfo 11-SP3 (src):    LibVNCServer-0.9.1-160.6.1

Comment 6 Swamp Workflow Management 2019-01-11 14:50:34 UTC

This is an autogenerated message for OBS integration:
This bug (1120121) was mentioned in
https://build.opensuse.org/request/show/664669 Factory / LibVNCServer

Comment 7 Swamp Workflow Management 2019-01-11 20:12:26 UTC

SUSE-SU-2019:0080-1: An update that fixes 9 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120119,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20023,CVE-2018-20024,CVE-2018-6307
Sources used:
SUSE Linux Enterprise Workstation Extension 15 (src):    LibVNCServer-0.9.10-4.3.1
SUSE Linux Enterprise Module for Packagehub Subpackages 15 (src):    LibVNCServer-0.9.10-4.3.1
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 (src):    LibVNCServer-0.9.10-4.3.1

Comment 8 Swamp Workflow Management 2019-01-12 02:16:31 UTC

openSUSE-SU-2019:0045-1: An update that fixes 9 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120119,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20023,CVE-2018-20024,CVE-2018-6307
Sources used:
openSUSE Leap 42.3 (src):    LibVNCServer-0.9.9-16.6.1

Comment 9 Swamp Workflow Management 2019-01-17 23:10:48 UTC

openSUSE-SU-2019:0053-1: An update that fixes 9 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120119,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20023,CVE-2018-20024,CVE-2018-6307
Sources used:
openSUSE Leap 15.0 (src):    LibVNCServer-0.9.10-lp150.3.3.1

Comment 10 Marcus Meissner 2019-01-29 07:41:56 UTC

rekleased

Comment 11 Swamp Workflow Management 2019-04-29 10:16:35 UTC

SUSE-SU-2019:0060-2: An update that fixes 9 vulnerabilities is now available.

Category: security (important)
Bug References: 1120114,1120115,1120116,1120117,1120118,1120119,1120120,1120121,1120122
CVE References: CVE-2018-15126,CVE-2018-15127,CVE-2018-20019,CVE-2018-20020,CVE-2018-20021,CVE-2018-20022,CVE-2018-20023,CVE-2018-20024,CVE-2018-6307
Sources used:
SUSE Linux Enterprise Server for SAP 12-SP1 (src):    LibVNCServer-0.9.9-17.8.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.