Exploit:Java/CVE-2012-1723.A allows an attacker to gain access to and run arbitrary files on your computer.
Make sure you install all available updates from Java to avoid this exploit. For more information on updating Java please see the Additional information section in this entry.
Additionally, note that an attacker cannot force you or your browser to visit a malicious website. Instead, an attacker may try to convince you to visit their website, typically by getting you to click a link in an email, an instant messenger request, a Facebook wall post or through other social engineering techniques.
If you do visit a webpage which hosts Exploit:Java/CVE-2012-1723.A, the exploit attempts to trigger the vulnerability in the JRE.
This vulnerability allows malware download other malware onto your computer, which may allow the attacker access to your computer.
Vulnerabilities in the JRE are rectified through the application of patches from the Java website.
Therefore, the best way to protect your computer from all Java vulnerabilities is to ensure that your version of Java is up-to-date. See the Java updates page for links to download the latest version for your operating system.
Analysis by Patrick Estavillo