oss-security - Re: CVE request: qemu-kvm: Setting VNC password to empty string silently disables all authentication

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1349870341.72848.1294841820197.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com>
Date: Wed, 12 Jan 2011 09:17:00 -0500 (EST)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com, Petr Matousek <pmatouse@...hat.com>
Cc: coley@...us.mitre.org
Subject: Re: CVE request: qemu-kvm: Setting VNC password to
 empty string silently disables all authentication

Please use CVE-2011-0011

Thanks.

-- 
    JB


----- Original Message -----
> "The semantics of the ',password' option to -vnc are that it enables
> the VNC
> auth scheme. If the VNC server password is unset or empty string, all
> attempts
> to authenticate with the server will be explicitly blocked.
> 
> This allows applications to enable and selectively allow access for a
> period of
> time, before clearing the password again to prevent further access.
> 
> Upstream changes have introduced a flaw by disabling all
> authentication when
> the password was cleared with upstream commit [1].
> 
> [1]
> http://www.qemu.com/qemu.git/commit/?id=52c18be9e99dabe295321153fda7fce9f76647ac"
> 
> Reference:
> https://bugzilla.redhat.com/show_bug.cgi?id=668589
> 
> Thanks,
> --
> Petr Matousek / Red Hat Security Response Team

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.