32104 : Mozilla Multiple Products location.hostname Null Byte URI Security Bypass
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13

Views All Time
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Feb 14, 2007

Discovery
Unknown

Dates

Exploit
Feb 14, 2007

Solution
Unknown

Keywords

 No Keywords

Description

 Mozilla Firefox, Mozilla SeaMonkey, and other Mozilla-based browsers contain a flaw that may allow a remote attacker to bypass security restrictions and gain knowledge of sensitive information. The issue is due to Mozilla-based browsers improperly handling writes to the 'location.hostname' DOM property. The flaw is triggered when a malicious web page writes a hostname value containing NULL characters ('\x00') to the 'location.hostname' DOM property, allowing for alteration of the 'document.domain' in order to bypass the same-origin policy for cross-frame/cross-window data access. This may allow an attacker the ability to manipulate authentication cookies for third party web pages and tamper with the way these sites are displayed or how they work, resulting in a loss of confidentiality.

Classification

 Location: Remote/Network Access Required
Attack Type: Input Manipulation
Impact: Loss of Confidentiality
Exploit: Exploit Available
Disclosure: OSVDB Verified

Solution

 Upgrade to the following product versions, as they have been reported to fix this vulnerability:
Mozilla Firefox: version 1.5.0.10 or higher
Mozilla Firefox 2: version 2.0.0.2 or higher
Mozilla SeaMonkey: version 1.0.8 or higher

It is also possible to correct the flaw by implementing the following workaround:
Deny setting location.hostname by placing the following line in your user.js file:
user_pref("capability.policy.default.Location.hostname.set", "noAccess");
If you don't have one, create one in notepad and place it in your profile directory (e.g. C:\Program Files\Mozilla Firefox\defaults\profile).

Products
Mozilla Organization
Watch-list
Firefox
Watch-list
 2.0.0.2
1.5.0.10
0.8
0.9
0.9.1
0.9.2
0.9.3
0.10
1.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.0.7
1.0.8
1.5
1.5.0.1
1.5.0.2
1.5.0.3
1.5.0.4
1.5.0.5
1.5.0.6
1.5.0.7
1.5.0.9
2.0
1.5.0.8
2.0.0.1
0.1
0.2
0.3
0.4
0.5
0.6
0.6.1
0.7
0.7.1
SeaMonkey
Watch-list
 1.0.8
1.0.7
1.0.6
1.0.5
1.0.3
1.0.2
1.0.1
1.0
1.1.1

References

Tools & Filters

Nessus

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Manual Testing Notes

Credit
  • Michał Zalewski - lcamtufBrand New Doo Doocoredump.cx - http://lcamtuf.coredump.cx/

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