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Date: Fri, 07 Feb 2014 08:25:58 +0000
From: "Jan Beulich" <>
To: <>
Cc: <>,<>
Subject: Re: Xen Security Advisory 84 - integer overflow in several
 XSM/Flask hypercalls

>>> On 06.02.14 at 18:23, <> wrote:
> Hash: SHA1
> We can provide the three CVE assignments for XSA-84 (as well as the
> one CVE assignment for XSA-85 and the one CVE assignment for XSA-86).
> However, could you please clarify:
>> ====================
>> Public release.
>> The patch for 4.1 was extended to cover a few further similar issues.
> Here, was the original scope of "The patch for 4.1" (before it was
> extended) exclusively:
>   "a different overflow issue on FLASK_{GET,SET}BOOL and expose
>    unreasonably large memory allocation to arbitrary guests"
> ? Or do you mean that, originally, the "patch for 4.1" addressed
> another vulnerability, and this "different overflow issue" was one of
> the version-2 extensions to the scope of XSA-84?

The original patch was dealing with just the unbounded memory
allocation. The missing bounds checking was what the incremental
addition dealt with.


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