Bugtraq mailing list archives

Re: <BASE> tag used for hijacking external resources (XSS)

From: Mario Vilas <mvilas () gmail com>
Date: Fri, 16 Dec 2011 22:12:10 +0100

Makes sense as a trick to bypass some crappy XSS filters that look
forstrings like "javascript:", but I don't think it's a vulnerability
in itself.

On Fri, Dec 16, 2011 at 5:20 PM, Jann Horn <jannhorn () googlemail com> wrote:


2011/12/15 Bouke van Laethem <vanlaethem () gmail com>:

ISSUE:
The <base> tag is parsed outside of <head></head>. This can lead to
the base being reset, both before and after the <base> tag being
injected, depending on browser types and versions. As a result, images
and javascript can be loaded from an attackers domain, and forms and
hyperlinks point to the attackers domain.


Erm... so you're basically assumint that the attacker can inject stuff
into the page? If that's the case, you should have other issues than
your links getting altered or so, no? E.g. what about javascript
injection?





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enemy of the state, the other serves and protects the people. When the
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Current thread:

<BASE> tag used for hijacking external resources (XSS) Bouke van Laethem (Dec 16)
- Re: <BASE> tag used for hijacking external resources (XSS) Jann Horn (Dec 16)
  - Re: <BASE> tag used for hijacking external resources (XSS) Mario Vilas (Dec 19)
  - Message not available
    - Re: <BASE> tag used for hijacking external resources (XSS) Bouke van Laethem (Dec 19)
    - Re: <BASE> tag used for hijacking external resources (XSS) Mario Vilas (Dec 19)
    - Re: <BASE> tag used for hijacking external resources (XSS) Bouke van Laethem (Dec 19)
    - Re: <BASE> tag used for hijacking external resources (XSS) Mario Vilas (Dec 19)