SecurityTracker Alert ID: 1002762|
SecurityTracker URL: http://securitytracker.com/id/1002762
(Links to External Site)
Date: Nov 16 2001
Disclosure of system information, Disclosure of user information|
Exploit Included: Yes |
Version(s): Opera 5.12/Windows, Opera 5.0/Linux, Opera 6.0 beta 1/Windows; other versions may be affected|
A user has provided additional details: The user notes that the vulnerability can also be used to list files on the user's harddrive. This is reportedly possible because Opera processes the URL file://c:/ as a normal HTML page. The user has provided some exploit examples in the Source Message.
Vendor URL: www.opera.com/ (Links to External Site)
Access control error|
|Underlying OS: Linux (Any), Windows (Any)|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Opera. I was still waiting for any respond from Opera when I saw
Guninski's bugtraq post.
One thing that wasn't mentioned and might not be obvious is that the
vulnerability can also be used to list files on the user's harddrive. This
is because the url file://c:/ is seen as a html-page by Opera. Thus we can
use document.links to retrieve filenames and directories.
Opera released 6.0 beta 1 for windows three days ago and it's also
vulnerable. In fact it's actually much easier to write the script for it
and easier to make the attack invisible since Opera added better support
Opera 6.0 (not 5.x): List files and directories in c:/
<iframe id="rewrite" src="file://c:/" width=0 height=0></iframe>
Opera 6.0 (not 5.x): Get google cookie
<iframe id="rewrite" src="http://www.google.com/" width=0 height=0></iframe>
My webdemo written for the Opera staff was put on the private url:
But I don't see any reason to keep it private now when Guninski made the
On Thu, 15 Nov 2001, Georgi Guninski wrote:
> Georgi Guninski security advisory #51, 2001
> Systems affected:
> Opera 5.12/Windows, Opera 5.0/Linux - probably other versions
> Risk: Medium
> Date: 15 November 2001
> Legal Notice:
> This Advisory is Copyright (c) 2001 Georgi Guninski.
> You may distribute it unmodified.
> You may not modify it and distribute it or distribute parts
> of it without the author's written permission.
> The information in this advisory is believed to be true based on
> experiments though it may be false.
> The opinions expressed in this advisory and program are my own and
> not of any company. The usual standard disclaimer applies,
> especially the fact that Georgi Guninski is not liable for any damages
> caused by direct or indirect use of the information or functionality
> provided by this advisory or program. Georgi Guninski bears no
> responsibility for content or misuse of this advisory or program or
> any derivatives thereof.
> I am looking for contracts in the security area - check http://www.guninski.com
> Opera is a multiplatform web browser.
> script in a page to access a page and its properties in another domain -
> AFAIK Netscape call this "Same Origin Vulnerability".
> It is possible a script in web page to access at least cookies and links
> in arbitrary domains to which the user has access.
> It is also possible a script to read the the links in the user's cache and
> history which at least have privacy implications if not more.
> In some cases cookies and links in the cahe/history may containg sensitive information
> such as usernames/passwords etc.
> Examine the following scripts:
> function f()
> function f()
> In addiotion the HotJava explot at http://www.guninski.com/hotjava1-desc.html works as
> Jay@InfoAve.net pointed out.
> Vendor status:
> The vendor was notified on 5 November 2001 and was asked whether a fix shall be issued and when.
> The reply was:
> which means that pages with password protection aren't cached, cookies aren't stored,
> the URL shouldn't be displayed in History, etc.
> This is a "paranoia" option, and makes a few pages unusable.
> As you are probably aware, many web technologies aren't very secure,
> but it is inconvenient for the user to block these.
> This is why the user should be given a choice to block privacy related information.
> Georgi Guninski
o' \,=./ `o