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Mozilla Foundation Security Advisory 2009-68

Title: NTLM reflection vulnerability
Impact: High
Announced: December 15, 2009
Reporter: Takehiro Takahashi
Products: Firefox, SeaMonkey

Fixed in: Firefox 3.5.6
  Firefox 3.0.16
  SeaMonkey 2.0.1


Security researcher Takehiro Takahashi of the IBM X-Force reported that Mozilla's NTLM implementation was vulnerable to reflection attacks in which NTLM credentials from one application could be forwarded to another arbitary application via the browser. If an attacker could get a user to visit a web page he controlled he could force NTLM authenticated requests to be forwarded to another application on behalf of the user.