Bug 1661117 (CVE-2018-20020) - CVE-2018-20020 libvncserver: Heap out-of-bound write inside structure in VNC client code allows for potential code execution
Summary: CVE-2018-20020 libvncserver: Heap out-of-bound write inside structure in VNC ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-20020
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:
Depends On: 1661119 1661118 1663000 1663005
Blocks: 1661105
TreeView+ depends on / blocked
 
Reported: 2018-12-20 07:06 UTC by Sam Fowler
Modified: 2021-10-25 22:22 UTC (History)
4 users (show)

Fixed In Version:
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Environment:
Last Closed: 2021-10-25 22:22:31 UTC


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Description Sam Fowler 2018-12-20 07:06:11 UTC
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution.


External Reference:

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/


Upstream Patch:

https://github.com/LibVNC/libvncserver/commit/7b1ef0ffc4815cab9a96c7278394152bdc89dc4d

Comment 1 Sam Fowler 2018-12-20 07:06:25 UTC
Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1661119]
Affects: fedora-all [bug 1661118]

Comment 2 Sam Fowler 2018-12-20 07:38:33 UTC
Upstream Issue:

https://github.com/LibVNC/libvncserver/issues/250


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