Rule History

alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET DELETED PDF Name Representation Obfuscation of JBIG2Decode, Very Likely Memory Corruption Attempt"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"JBIG2Decode"; within:11; content:"#"; within:31; pcre:"/\x3C\x3C(\x0D\x0A|\x0A)[^>]*\x2F[^JBIG2Decode](J|#4A)(B|#42)(I|#49)(G|#47)(2|#32)(D|#44)(e|#65)(c|#63)(o|#6F)(d|#64)(e|#65)/smi"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; reference:url,blog.didierstevens.com/2009/03/01/quickpost-jbig2decode-signatures/; reference:bugtraq,33751; reference:cve,2009-0658; classtype:attempted-user; sid:2011534; rev:7; metadata:created_at 2010_09_27, confidence Medium, signature_severity Unknown, updated_at 2019_07_26;)