Bug 857250 (CVE-2012-4429)

Summary:	CVE-2012-4429 vino: information leak and authentication bypass
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	debarshir, jlieskov, sandmann
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-01-22 05:18:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	857252, 888637, 888638
Bug Blocks:	857251

Description Vincent Danen 2012-09-13 22:40:44 UTC

It was reported [1],[2] that vino transmits all clipboard activity to anything listening on port 5900, including to clients that have not authenticated.  If a user were to have vino enabled (including requiring authentication), a remote user could access the port and see anything the user added to the clipboard sent over the port.

To reproduce, enable vino with password protection (i.e. execute vino-preferences).  Connect to the VNC port (either locally or remotely), for instance:

% nc -4 odvfc17 5900
RFB 003.007
@??zsh: command not found: zsh:@??[vdanen@odvfc17]

The above two bits of output are from copying in the GNOME terminal, locally, on the system running vino.

The above was tested with Fedora 17's 3.4.2 version; the report indicates that 2.32 on Gentoo and 2.28 on Debian are also vulnerable.

[1] https://bugs.gentoo.org/show_bug.cgi?id=434930
[2] https://bugzilla.gnome.org/show_bug.cgi?id=678434

Comment 2 Vincent Danen 2012-09-13 22:49:21 UTC

Created vino tracking bugs for this issue

Affects: fedora-all [bug 857252]

Comment 3 Jan Lieskovsky 2012-09-14 09:04:29 UTC

The CVE identifier of CVE-2012-4429 has been assigned to this issue:
http://www.openwall.com/lists/oss-security/2012/09/14/1

Comment 4 Huzaifa S. Sidhpurwala 2012-12-17 05:18:25 UTC

Proposed upstream patch at:
http://bugzilla-attachments.gnome.org/attachment.cgi?id=231701

Comment 5 Huzaifa S. Sidhpurwala 2012-12-18 03:41:43 UTC

Upstream patch:
http://git.gnome.org/browse/vino/commit/?id=9c8b9f81205203db6c31068babbfb8a734acacdb

Comment 8 errata-xmlrpc 2013-01-21 22:37:32 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:0169 https://rhn.redhat.com/errata/RHSA-2013-0169.html