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Mozilla Foundation Security Advisory 2012-05

Frame scripts calling into untrusted objects bypass security checks

Announced
January 31, 2012
Reporter
moz_bug_r_a4
Impact
Critical
Products
Firefox, SeaMonkey, Thunderbird
Fixed in
  • Firefox 10
  • SeaMonkey 2.7
  • Thunderbird 10

Description

Mozilla security researcher moz_bug_r_a4 reported that frame scripts bypass XPConnect security checks when calling untrusted objects. This allows for cross-site scripting (XSS) attacks through web pages and Firefox extensions. The fix enables the Script Security Manager (SSM) to force security checks on all frame scripts.

Firefox 3.6 and Thunderbird 3.1 are not affected by this vulnerability.

References