CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2013-033

DATE(S) ISSUED:
03/15/2013

SUBJECT:
Vulnerability In Oracle Java SE Could Allow Remote Code Execution

OVERVIEW:

A vulnerability has been discovered in Oracle Java SE that can lead to remote code execution. The Java Platform, Standard Edition (SE) is used to develop and deploy Java applications on desktops and servers. This vulnerability may be exploited if a user visits, or is redirected to a specifically crafted web page. Successful exploitation of this vulnerability could result in an attacker gaining the same privileges as the Java application. Depending on the privileges associated with the application, an attacker could execute arbitrary code in the context of the application, and bypass security restrictions.

SYSTEMS AFFECTED:

  • Oracle Java 7 Update 17. Earlier versions may also be affected.

RISK:

Government:

  • Large and medium government entities: High
  • Small government entities: High

Businesses:

  • Large and medium business entities: High
  • Small business entities: High

Home users: High

DESCRIPTION:

A vulnerability has been discovered in Oracle Java SE that can lead to remote code execution. In order to exploit this vulnerability, an attacker must first create a web page with a specially crafted applet designed to leverage this issue. When the web page is visited, the attacker supplied code is run in the context of the affected application. Successful exploitation of this vulnerability could result in an attacker gaining the same privileges as the java application. Depending on the privileges associated with the application, an attacker could execute arbitrary code in the context of theapplication, and bypass security restrictions.

This vulnerability was demonstrated at a recent cyber security forum; however no public working exploits are reported to be available.

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Apply the patch from Oracle, after appropriate testing, as soon as it becomes available.
  • Consider disabling Java completely on all systems until a patch is available.
  • Set web browser security to disable the execution of script code or active content
  • Run all software as a non-privileged user (one without administrative privilege.es) to diminish the effects of a successful attack.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trustedsources.
  • Remind users not to open e-mail attachments from unknown users or suspicious e-mails from trusted sources.

REFERENCES:

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1491

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0402

Security Focus:

http://www.securityfocus.com/bid/58493

http://www.securityfocus.com/bid/58397

Net-Security:

http://www.net-security.org/secworld.php?id=14563