oss-sec mailing list archives
Re: Re: Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang
From: Kurt Seifried <kseifried () redhat com>
Date: Mon, 02 Dec 2013 11:16:44 -0700
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/02/2013 10:22 AM, Ian Jackson wrote:
Xen.org security team writes ("Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang"):This issue was predisclosed under embargo by the Xen Project Security team, on the 27th of November. We treated the issue as not publicly known because it was not evident from the public sources that this erratum constitutes a vulnerability (particularly, that it was a vulnerability in relation to some Xen configurations). Since then, the fact that this CPU erratum is likely to constitute a security problem has been publicly disclosed, on the oss-security mailing list.This is a reference to this message: http://www.openwall.com/lists/oss-security/2013/11/28/1 This was sent by MITRE as part of the CVE assignment. It seems likely to us (the Xen Project security team) that the CVE assignment was a consequence of our embargoed predisclosure to xen-security-issues. The effect of this has been that we have had to end the embargo early. I think there is room for discussion here about whether we all did the right thing. In particular: * Should the Xen Project security te4am have treated this issue with an embargo at all, given that the flaw itself was public ?
I would say this depends on the level of public disclosure. For example from "upstream" (AMD) there was a very limited disclosure (no public announcement I'm aware of) and just some notes in a single PDF. However this was also made public via the person who found it and then picked up by ZDnet in an article, so I would personally count that as quite public.
* Should we have anticipated that other software would be in a similar position and sent message(s) to some other suitable set of vendor(s) ? Which vendors, and how ?
Yes and no, with hardware obviously it's likely that other software will leave the bug exposed, the problem is finding all of it and notifying people is a very non trivial task.
* Should MITRE have been asked /not/ to publicly disclose the relationship between CVE-2013-6885 and AMD CPU erratum 793, until the embargo ended ?
That was my fault, I didn't think to ask them to handle this as a private assignment since the issue was quite public/old (see above).
* Were we right to treat MITRE's message as a trigger for disclosure ?
Don't know.
Thanks, Ian.
- -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQIcBAEBAgAGBQJSnM6LAAoJEBYNRVNeJnmTX+kQANqW6JvY/c9IYcuVel8DD5+S 5351tgVQkKfqVRqFT3R+azlTlk/Y2Kg/YTaqTSJmwQ/WtT61P3d8WKH2P9eD35OM 9CCnL+xc5r60zMcEokvdxBPYvtSkhDHvy2hp2RtFmnrMbIHrSO9cs1vvu+j9L480 ZR1rtrhNt7q/+I7Cpy++iOLtpARiBHDivKdpk47gsE3s/mVlhrAbQWA6Dl1TSJs2 /ByUdsBUhwiwvhEALZrH+/ovqX52RwvCqmFPYfgLo1y+I1uk536NnV3qlcvU3gxP O4mtSQ6jGVzAnaiBHMYY6yVrPggB/WhxnWCmIaMQ3Taz/qYIyM5sGL2iljClvjsj WlT2Ve3KCZ7sOsiIAgZS31XST/Ey70xacs2FzzF74UUFCPbint1bEC2adlRQlMQG jBcVi9k+lFm/XUeRh8LorRyyMGutdnOMbsu3REjHRycjhc4U0hXunQLAJZbmqChY 9lkrbkm2K6J0mrTIXZy2Y+Wl+kaWzdSMtUyU5QHHyqv3OAQbODH7Li0vxjwDT7/K iFQb4sPwUAUAWQTuZ/qloCJRTcFzVNIF97vPpOQVlGouTSTfUvQJ7NDY+Yta5RwM PzkJjPHDZvGVrK07jw5w1kpjj4C/RcopvZaW0dxc62N8RPE60HsTZ/rSmT2IP9yQ qPROKaphfmISa4AwZSTp =r3rU -----END PGP SIGNATURE-----
Current thread:
- Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang Xen . org security team (Dec 02)
- Re: Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang Ian Jackson (Dec 02)
- Re: Re: Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang Kurt Seifried (Dec 02)
- Re: Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang cve-assign (Dec 02)
- Re: Xen Security Advisory 82 (CVE-2013-6885) - Guest triggerable AMD CPU erratum may cause host hang Ian Jackson (Dec 02)