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openSUSE Leap 42.3: 2018:0851-1 Important LibVNCServer Denial of Service

opensuse
Calendar Grey March 30, 2018
Dist Opensuse Esm H88
LibVNCServer has been upgraded for openSUSE Leap 42.3 to address significant security vulnerabilities and enhance overall system protection.
An update that fixes three vulnerabilities is now available.

Description

LibVNCServer was updated to fix two security issues.

These security issues were fixed:

- CVE-2018-7225: Missing input sanitization inside rfbserver.c

rfbProcessClientNormalMessage() (bsc#1081493).

- CVE-2016-9942: Heap-based buffer overflow in ultra.c allowed remote

servers to cause a denial of service (application crash) or possibly

execute arbitrary code via a crafted FramebufferUpdate message with the

Ultra type tile, such that the LZO payload decompressed length exceeds

what is specified by the tile dimensions (bsc#1017712).

- CVE-2016-9941: Heap-based buffer overflow in rfbproto.c allowed remote

servers to cause a denial of service (application crash) or possibly

execute arbitrary code via a crafted FramebufferUpdate message

containing a subrectangle outside of the client drawing area

(bsc#1017711).

This update was imported from the SUSE:SLE-12:Update update project.

Topics%20covered

Topics Covered

security advisory security update critical heap overflow Denial of Service openSUSE LibVNCServer

Patch

Patch Instructions:

To install this openSUSE 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:

- openSUSE Leap 42.3:

zypper in -t patch openSUSE-2018-326=1

Package List

- openSUSE Leap 42.3 (i586 x86_64):

LibVNCServer-debugsource-0.9.9-16.3.1

LibVNCServer-devel-0.9.9-16.3.1

libvncclient0-0.9.9-16.3.1

libvncclient0-debuginfo-0.9.9-16.3.1

libvncserver0-0.9.9-16.3.1

libvncserver0-debuginfo-0.9.9-16.3.1

linuxvnc-0.9.9-16.3.1

linuxvnc-debuginfo-0.9.9-16.3.1

References

https://www.suse.com/security/cve/CVE-2016-9941.html

https://www.suse.com/security/cve/CVE-2016-9942.html

https://www.suse.com/security/cve/CVE-2018-7225.html

https://bugzilla.suse.com/1017711

https://bugzilla.suse.com/1017712

https://bugzilla.suse.com/1081493

--

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2018:0851-1
Rating: important
Affected Products: openSUSE Leap 42.3

Topics%20covered

Topics Covered

security advisory security update critical heap overflow Denial of Service openSUSE LibVNCServer

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