Yara Detection for Java Applet JMX Remote Code Execution (CVE-2013-0422)

Posted: January 12th, 2013 | Author: | Filed under: IT Related | Tags: , , , | 3 Comments »

Hi

It’s a bit to late for me to write this, but at least CVE-2013-0422 is no longer a secret.. and yes I can share some yara rule for this

Anyway, thanks to @kafeine for the disclosure and thanks to Immunity for a very good write up.

So here you go:

rule CVE_2013_0422
{
        meta:
                description = "Java Applet JMX Remote Code Execution"
                cve = "CVE-2013-0422"
                ref = "http://pastebin.com/JVedyrCe"
                author = "adnan.shukor@gmail.com"
                date = "12-Jan-2013"
                version = "1"
                impact = 4
                hide = false
        strings:
                $0422_1 = "com/sun/jmx/mbeanserver/JmxMBeanServer" fullword
                $0422_2 = "com/sun/jmx/mbeanserver/JmxMBeanServerBuilder" fullword
                $0422_3 = "com/sun/jmx/mbeanserver/MBeanInstantiator" fullword
                $0422_4 = "findClass" fullword
                $0422_5 = "publicLookup" fullword
                $class = /sun\.org\.mozilla\.javascript\.internal\.(Context|GeneratedClassLoader)/ fullword 
        condition:
                (all of ($0422_*)) or (all of them)
}

Kindly leave comment I you find ways to improvement this rule. Obfuscation? yeah of course can be used to bypassed this rule as well 😉

Thanks

P/S: MyYaraSIG members should have receive this rule/update earlier today. Just git pull everyone 🙂