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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0067.2 Oracle Java 7 Security Manager Bypass Vulnerability 14 January 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Oracle Java Publisher: US-CERT Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Mitigation CVE Names: CVE-2013-0422 Original Bulletin: http://www.us-cert.gov/cas/techalerts/TA13-010A.html Comment: A remote code execution vulnerability is being actively exploited in Oracle Java. Exploit code is publicly available. No patch has been released by the vendor at this time. AusCERT recommends: uninstall or disable Java where possible, or restrict Internet access to a trusted set of business critical sites. Revision History: January 14 2013: Added CVE January 11 2013: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Awareness System US-CERT Alert TA13-010A Oracle Java 7 Security Manager Bypass Vulnerability Original release date: January 10, 2013 Last revised: -- Systems Affected Any system using Oracle Java 7 (1.7, 1.7.0) including * Java Platform Standard Edition 7 (Java SE 7) * Java SE Development Kit (JDK 7) * Java SE Runtime Environment (JRE 7) All versions of Java 7 through update 10 are affected. Web browsers using the Java 7 plug-in are at high risk. Overview A vulnerability in the way Java 7 restricts the permissions of Java applets could allow an attacker to execute arbitrary commands on a vulnerable system. Description A vulnerability in the Java Security Manager allows a Java applet to grant itself permission to execute arbitrary code. An attacker could use social engineering techniques to entice a user to visit a link to a website hosting a malicious Java applet. An attacker could also compromise a legitimate web site and upload a malicious Java applet (a "drive-by download" attack). Any web browser using the Java 7 plug-in is affected. The Java Deployment Toolkit plug-in and Java Web Start can also be used as attack vectors. Reports indicate this vulnerability is being actively exploited, and exploit code is publicly available. Further technical details are available in Vulnerability Note VU#625617. Impact By convincing a user to load a malicious Java applet or Java Network Launching Protocol (JNLP) file, an attacker could execute arbitrary code on a vulnerable system with the privileges of the Java plug-in process. Solution Disable Java in web browsers This and previous Java vulnerabilities have been widely targeted by attackers, and new Java vulnerabilities are likely to be discovered. To defend against this and future Java vulnerabilities, disable Java in web browsers. Starting with Java 7 Update 10, it is possible to disable Java content in web browsers through the Java control panel applet. From Setting the Security Level of the Java Client: For installations where the highest level of security is required, it is possible to entirely prevent any Java apps (signed or unsigned) from running in a browser by de-selecting Enable Java content in the browser in the Java Control Panel under the Security tab. If you are unable to update to Java 7 Update 10 please see the solution section of Vulnerability Note VU#636312 for instructions on how to disable Java on a per browser basis. References * Vulnerability Note VU#625617 <http://www.kb.cert.org/vuls/id/625617> * Setting the Security Level of the Java Client <http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/client-security.html> * The Security Manager <http://docs.oracle.com/javase/tutorial/essential/environment/security.html> * How to disable the Java web plug-in in Safari <https://support.apple.com/kb/HT5241> * How to turn off Java applets <https://support.mozilla.org/en-US/kb/How%20to%20turn%20off%20Java%20applets> * NoScript <http://noscript.net/> * Securing Your Web Browser <https://www.us-cert.gov/reading_room/securing_browser/#Safari> * Vulnerability Note VU#636312 <http://www.kb.cert.org/vuls/id/636312#solution> Revision History January 10, 2013: Initial release ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. Please send email to <cert@cert.org> with "TA13-010A Feedback VU#625617" in the subject. ____________________________________________________________________ Produced by US-CERT, a government organization. ____________________________________________________________________ This product is provided subject to this Notification: http://www.us-cert.gov/privacy/notification.html Privacy & Use policy: http://www.us-cert.gov/privacy/ This document can also be found at http://www.us-cert.gov/cas/techalerts/TA13-010A.html For instructions on subscribing to or unsubscribing from this mailing list, visit http://www.us-cert.gov/cas/signup.html - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iQEVAwUBUO83IXdnhE8Qi3ZhAQLdxQf6A2LhLrArDieg41fxTuIViOXbgH6fZrDt 6bODaZIeTcvQfMMURbUb8MnTQEe7ogNbytb+XQaEzXE6A0YMdWp+93TxFy80wUI0 VpF0lBDwNyeAlwtzicLSQa5oa5Me0k5KPVUn9/mFJZh5Ff0cYjW1dt8dfXJUbH9/ OZ6ZJsnJchymJFlVax3Y87yZh9fPQC4n6dJ86CdLXqC9GaBihgBd1DUpborfWYoR njvrtbcX+7iy+J8fS2C8/JtnQ5M+uilvqxrdU/Z9SdmebIF5HQjafLae9OmwH7Te nxUcwwmuNqIA1Y9aN2DrStv+HnTi121DIxyaVgNOKjPnO/t5mDPKlw== =xi3d - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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