Bug 1549172 – CVE-2018-7226 libvncserver: integer overflow in vcSetXCutTextProc in VNConsole.c

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Bug 1549172 - (CVE-2018-7226) CVE-2018-7226 libvncserver: integer overflow in vcSetXCutTextProc in VNConsole.c

Summary:	CVE-2018-7226 libvncserver: integer overflow in vcSetXCutTextProc in VNConsole.c

Status:	CLOSED NOTABUG

Aliases:	CVE-2018-7226

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
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Whiteboard:	impact=low,public=20180218,reported=2...
Keywords:	Security

Depends On:	1549173 1549174
Blocks:	1546862
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Reported:	2018-02-26 10:32 EST by Laura Pardo
Modified:	2018-04-03 04:09 EDT (History)
CC List:	3 users (show)

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Last Closed:	2018-04-03 04:09:04 EDT
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Description Laura Pardo 2018-02-26 10:32:26 EST

An issue was discovered in vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through 0.9.10. Missing sanitization of the client-specified message length may cause integer overflow or possibly have unspecified other impact via a specially crafted VNC packet.


References:
https://github.com/LibVNC/vncterm/issues/6
http://openwall.com/lists/oss-security/2018/02/18/2

Comment 1 Laura Pardo 2018-02-26 10:32:58 EST

Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1549173]
Affects: fedora-all [bug 1549174]

Comment 2 Stefan Cornelius 2018-04-03 04:09:04 EDT

vncterm is not shipped as part of our RHEL6/7 packages.

Comment 3 Stefan Cornelius 2018-04-03 04:09:14 EDT

Statement:

This issue did not affect the versions of libvncserver as shipped with Red Hat Enterprise Linux 6 and 7.

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