what you don't know can hurt you

Adobe Omniture Cookie-Forcing

Adobe Omniture Cookie-Forcing
Posted Mar 29, 2011
Authored by Tom Keetch

Adobe Omniture suffers from a vulnerability where a malicious cookie can hijack secure connections to the domain by injecting malicious javascript into the page via the cookie.

tags | advisory, javascript
MD5 | 850207cca477df4f0c6a06797bc2710e

Adobe Omniture Cookie-Forcing

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Hi All,

Adobe have yet to set a fix date for this cookie forcing issue I found
in their Omniture product. If the affected "plug-in" is installed on a
HTTPS protected site, then by setting a malicious cookie for the
insecure domain, it is possible to hijack secure connections to the
domain by injecting malicious JavaScript into the page via the cookie.
This issue would be exploitable by a malicious WiFi access point.

Chris Evans at Google explains this class of issue in far more detail here:
http://scarybeastsecurity.blogspot.com/2008/11/cookie-forcing.html

I am releasing this bug (in a personal capacity) because Adobe have
been doing nothing with it for just short of three months and deem it
to be not an issue. If this vulnerability affects your site, then
disable the affected plug-in, or Omniture as a whole. If you wish to
contact Apple (psirt@adobe.com) about this bug, then please refer to
PSIRT issue #798. I believe that it is more responsible to release
this publically, than to leave it "undiscovered" in the product.

Hardly a critical bug, but notable because it will apparently never be
fixed (or I am wrong and no such issue exists).

The affected code snippet is reproduced below.

####

s_object_name.crossVisitParticipation = function(val, cookie_name, ex,
ct, dl, events)
{
...
var cookie_value = this.cookie_read(cookie_name);
...
var h = new Array;
if (cookie_value && cookie_value != "")
{
arry = eval(cookie_value);
}
...

####


Cheers,

Tom
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