Tag Archives: Java

Oracle update to Java 7 Update 17 and to Java 6 Update 43, but…

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Oracle, stressed by the new Java 0day discovered exploited in the wild, seem to have release new updates for Java 7, Java 6 and Java 5. Java 7 is updated to version 1.7.0_17, Java 6 is updated to version 1.6.0_43 and Java 5 is updated to version 1.5.0_41.

java7u17

These update are pushed an “Oracle Security Alert for CVE-2013-1493” who fix CVE-2013-1493 vulnerability related to the Java 0day, but also another vulnerability, aka CVE-2013-0809, affecting Java running in web browsers. Both vulnerabilities have a CVSS base score of 10.0 and are remotely exploitable without authentication.

Vulnerabilities are credited to an anonymous Reporter of TippingPoint’s Zero Day Initiative, axtaxt via Tipping Point’s Zero Day Initiative, Darien Kindlund of FireEye, Vitaliy Toropov via iDefense and to Vitaliy Toropov via TippingPoint. As you may remember, CVE-2013-1493 was discovered exploited in the wild by FireEye, but it seem that this vulnerability was also previously discovered by a security researcher working with 0day brokers. It is not the first time that we see 0days exploited in the wild, previously reported to 0day brokers !

Also, Security Explorations, a security firm responsible for identifying most of the latest Java vulnerabilities, is not credited for any of the patched vulnerabilities. So they are still bunch off reported vulnerabilities in Java.

Last but not least, Security Explorations has report, today, five new security issues for Java 7 who can be used to gain a complete Java security sandbox bypass in the environmentof Java SE 7 Update 15.

CVE-2013-1493 aka Yet Another Oracle Java 0day

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Less than 15 days after the release of Oracle Java CPU Special Update of 19 February, another Java 0day is reported exploited in the wild !

FireEye has report, in a blog post, the discovery of a new Oracle Java 0day targeting latest versions JSE 6 Update 41 and JSE 7 Update 15.

After successful exploitation of the newly discovered vulnerability, CVE-2013-1493, “svchost.jpg” (b6c8ede9e2153f2a1e650dfa05b59b99) file is loaded from the same server hosting the Java 0day. Then McRAT (aka Trojan.Naid) malware (4d519bf53a8217adc4c15d15f0815993)  is dropped.  Regarding the detection ratio of this malware (21/46), it seem that the Java 0day could be used in Exploit Pack.

Symantec has report some connections through the new Oracle Java 0day with the Bit9 security incident. In the actual Java 0day security incident case, “appmgmt.dll” file, dropped by “svchost.jpg“, is detected by Symantec as Trojan.Naid. Trojan.Naid sample is connecting 110.173.55.187 C&C server. In the Bit9 security incident case, Trojan.Naid was also present and also connecting to 110.173.55.187 C&C server. Symantec detect this Java 0day as “Trojan.Maljava.B” and regarding associated threat assessment, less than 49 computers were infected and less than 2 websites were used in the watering hole attack.

Some security researchers are actually studying the sample, it is question of days before this 0day will be widely exploited.

We advise you to deactivate Java plug-in execution asap.

Update 2013-03-07:

Samples are appearing on VirusTotal like “svchost.jar” (a721ca9b2ea1c362bd704b57d4d5a280) with an actual detection ratio of 17/46.

Gong Da / Gondad Exploit Pack Add Flash CVE-2013-0634 Support

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If you are working in computer security and still don’t have heard about the latest Adobe Flash 0days, aka CVE-2013-0633 and CVE-2013-0634, then you should change of job ! These vulnerabilities were found exploited in targeted attacks through spear phishing email messages targeting several industries including the aerospace one.

One of the e-email attached Word document was using the 2013 IEEE Aerospace Conference schedule, and another reported sample was related to online payroll system of ADP US company, to exploit CVE-2013-0633. I wrote a complete blog post regarding this campaign 2 weeks ago.

Adobe fixed the vulnerabilities in APSB13-04 the 7 February, but the vulnerabilities were not found massively exploited in Exploit Kits. Also there was a confusion,  by anti-virus vendors and security researchers, regarding CVE-2013-0633 and CVE-2013-0634 detection. But as mentioned in Adobe APSB13-04 CVE-2013-0633 was only exploited by been embedded in Word documents and CVE-2013-0634 was exploited through HTML web pages and by been embedded in Word documents.

So as nobody as seen CVE-2013-0633 working outside a Word document, I will suppose that the vulnerability I discovered exploited in Gong Da exploit kit is potentially a fork of CVE-2013-0633 or could be CVE-2013-0634. Colleagues, you are welcome for comments 🙂

Here is the new code in Gong Da exploit kit.

Capture d’écran 2013-02-25 à 23.29.30

If you take a look at the ActionScript of “myrF03.swf” (506fe8f82ea151959c5160bc40da25b5) you will see some similarities with CVE-2013-0633, like the “ByteArrayAsset” mentioned by MalwareMustDie, or the well-known “LadyBoyle” function.

Capture d’écran 2013-02-26 à 00.10.49

Capture d’écran 2013-02-26 à 00.11.03

This new version was discovered on “hxxp://www.jhtyhtrsgr.com/yymex/index.html” a web site how is actually still online.

Capture d’écran 2013-02-25 à 23.29.04

“jhtyhtrsgr.com” is hosted on 69.197.61.29, in US and this domain name was created the 22 Feb 2013 with registration informations located in China and the following contact “jing yan ([email protected]) – GuangMing yanjing“.

The “index.html” file containing JavaScript code obfuscated by “JSXX VIP JS Obfuscator“, but traditional traces if this obfuscator are no more available.

After de-obfuscation of the “index.html” file you can see that Gong Da Pack has involve to the following diagram.

Gong Da EK 1.4 - 2

Here under some information s regarding the different files:

  • vQSopE2.jpg (aka CVE-2011-3544) : 10/46 on VirusTotal.com
  • ulxzBc7.jpg (aka CVE-2012-0507) : 11/45 on VirusTotal.com
  • MQnA3.jpg (aka CVE-2012-1723) : 18/46 on VirusTotal.com
  • eATBNfg1.jpg (aka CVE-2012-4681) : 29/46 on VirusTotal.com
  • tkPfaMz7.jpg (aka CVE-2012-5076) : 14/46 on VirusTotal.com
  • iOiezo6.jpg (aka CVE-2013-0422): 19/46 on VirusTotal.com
  • YPVTz8.html (aka CVE-2012-1889): 14/46 on VirusTotal.com
  • vQSopE2.html (aka CVE-2012-1889): 12/46 on VirusTotal.com
  • myrFO3.swf (aka a fork of CVE-2013-0633 CVE-2013-0634): 8/46 on VirusTotal.com

Here under a demonstration video of CVE-2013-0633 CVE-2013-0634 without been embeded in a Word document.

Updates:

After investigation from @unixfreaxjp, it seem that the exploited vulnerability is CVE-2013-0634 and not CVE-2013-0633.