The Acrobat Java Script Blocklist Framework
Summary: Adobe released a JavaScript Blocklist Framework for Reader and Acrobat, letting administrators block specific JavaScript API functions rather than disabling JavaScript entirely. Cisco Talos tested it against the DocMedia.newPlayer bug in Adobe Reader 9.2.0 and found the registry keys and API function names are case-sensitive, that basic JavaScript obfuscation evasions could not be blocklisted, and that two previously exploited unpublicized Adobe JavaScript functions also could not be blocked.
Bottom line: The blocklist only stops the exact function names you enter, so obfuscated JavaScript and unpublicized functions like the two Talos tried to block can still reach the APIs you meant to close off.
Read the original at Cisco Talos ↗
- Topics
- Zero-Days & Exploits
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