[Bug 238616] CVE-2007-2381: MochiKit javascript hijacking vulnerability

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Summary: CVE-2007-2381: MochiKit javascript hijacking vulnerability

icon@xxxxxxxxxxxxxxxxx changed:

           What    |Removed                     |Added
             Status|ASSIGNED                    |CLOSED
         Resolution|                            |CANTFIX

------- Additional Comments From icon@xxxxxxxxxxxxxxxxx  2007-05-01 17:04 EST -------
Upstream sez (

> Will there be a fix for
> in the 1.3.1 branch?

Nope. It's not a real security issue, not with MochiKit anyway. The
recommended "fix" would mean supporting some junk that's not JSON
anymore. I've already caved and put said support on the trunk just so
people would shut up about the issue, but I'm certainly not going to
make a maintenance release to "fix" this non-issue.

Ensuring that your server only sends JSON when properly authenticated,
or otherwise sending only non-exploitable JSON (e.g. JSON with an
object envelope) is the only solution to this problem.

Only a very small subset of JSON, specifically [array, envelope, json]
is susceptible to this data leakage attack. Don't send that stuff on
the server-side, and there is no problem. Most people don't send array
envelope JSON anyhow. Either way, totally irrelevant to the
client-side. It's like saying that we should fix browsers so that they
can't be used to mount a SQL injection attack on a poorly written


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