Bug 1410168 (CVE-2016-9942) - CVE-2016-9942 libvncserver: Heap-based buffer overflow in ultra.c
Summary: CVE-2016-9942 libvncserver: Heap-based buffer overflow in ultra.c
Status: CLOSED WONTFIX
Alias: CVE-2016-9942
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20161114,repor...
Keywords: Security
Depends On: 1410180 1410178 1410179
Blocks: 1410176
TreeView+ depends on / blocked
 
Reported: 2017-01-04 16:17 UTC by Adam Mariš
Modified: 2017-05-26 03:54 UTC (History)
5 users (show)

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Clone Of:
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Last Closed: 2017-01-24 07:08:12 UTC


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Description Adam Mariš 2017-01-04 16:17:31 UTC
Heap-based buffer overflow was found in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 that allows 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.

Upstream patch:

https://github.com/LibVNC/libvncserver/commit/5fff4353f66427b467eb29e5fdc1da4f2be028bb

Upstream bug:

https://github.com/LibVNC/libvncserver/pull/137

Comment 1 Adam Mariš 2017-01-04 16:41:26 UTC
Created libvncserver tracking bugs for this issue:

Affects: fedora-all [bug 1410178]
Affects: epel-5 [bug 1410179]
Affects: epel-7 [bug 1410180]

Comment 3 Fedora Update System 2017-05-26 03:54:41 UTC
libvncserver-0.9.11-2.fc24.1 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.


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