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Setting the Security Level of the Java Client

As of the JDK 7u10 release, a user may control, via the Java Control Panel, the level of security that will be used when running unsigned (also called “untrusted” or “sandboxed”) Java apps in a browser. The user may select from five levels of security, including disabled, where no apps are allowed to run in the browser.

These security levels apply to running Java in the browser, which includes plugin applets, Java Web Start applications, embedded JavaFX applications, and access to the native deployment toolkit plugins. Setting the security level does not affect stand alone applications. Note that applets and these various types of applications are collectively referred to as apps or Java apps.

Ensuring the Most Secure JRE

Before the browser plugin software attempts to run a Java app, it verifies that the JRE version is at or above the security baseline for that family and that the age of the JRE is recent. If the JRE is deemed expired or insecure, additional security warnings are displayed. In most of these dialogs, the user has the option to block running the app, to continue running the app, or to go to java.com to download the latest release.

Disabling Java in the Browser

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.

Setting the Security Level of Unsigned Apps

Note: These settings affect all browsers that use Oracle’s Java browser plug-in. They do not affect desktop (also called stand alone) Java apps.

A Security Level slider has been added to the Java Control Panel (under the Security tab) to control the behavior when attempting to run unsigned apps (either from the web or local). The user can select low, medium, high or very high security settings. There are fewer security warnings at the lowest setting. While it is called the “Security Level control” (or slider), it can be thought of as the ability to control the level of notification you will receive when the browser attempts to run unsigned Java apps.

The following list summarizes the behavior of the different levels:

• Low Most unsigned Java apps in the browser will run without prompting unless they request access to a specific old version or to protected resources on the system.
• Medium Unsigned Java apps in the browser will run without prompting only if the Java version is considered secure. (The JRE version should be at or above the latest security update release of Java from Oracle.) You will be prompted if an unsigned app requests to run on an old version of Java. To download the latest version of Java, go to java.com.
• High You will be prompted before any unsigned Java app runs in the browser. If the JRE is below the security baseline, you will be given an option to update.
• Very High Unsigned (sandboxed) apps will not run.

The default security level is High.

Additionally, there are two checkboxes available in the Java Control Panel (under the Advanced tab) that are relevant to unsigned apps:

• Show sandbox warning banner
• Disables the warning icon that appears next to top level windows opened from an unsigned app.
• Allow user to accept JNLP security requests Allows an unsigned app that is deployed via JNLP to ask the user for increased access to computer resources like the hard drive or the printer.

Security Options for Trusted Signed or Self-Signed Apps

Note that the security options for trusted signed and self-signed apps has not changed in the 7u10 release. These options were available prior to the 7u10 release.

To select the behavior when attempting to run trusted signed or self-signed apps, there are several checkboxes available in the Java Control Panel (under the Advanced tab):

• Allow user to grant permissions to signed content
• Allow user to grant permissions to content from an untrusted authority
• Don’t prompt for client certificate selection when no certificates or only one exists
• Warn if site certificate does not match hostname
• Show site certificate even if it is valid

Install Options

In the JDK 7u10 release, new arguments for command line installation support setting the security level for Java in the browser. Admin privileges are required to install the JRE. Note that, in the 7u10 timeframe, these arguments are available only on Microsoft Windows.

• On installation, the WEB_JAVA argument has the following effect: WEB_JAVA=1 enables Java in the browser WEB_JAVA=0 disables Java in the browser
• On installation, the WEB_JAVA_SECURITY_LEVEL argument has the following effect: WEB_JAVA_SECURITY_LEVEL=VH sets the security level to very high WEB_JAVA_SECURITY_LEVEL=H sets the security level to high WEB_JAVA_SECURITY_LEVEL=M sets the security level to medium WEB_JAVA_SECURITY_LEVEL=L sets the security level to low

After installation of the JRE, verify the security level settings in the Java Control Panel.

Apps with Mixed Code

This information also applies to untrusted apps that have signed trusted extensions, but not to signed trusted apps that have unsigned unstrusted extensions. For more information, see Mixing Signed and Unsigned Code.

FINALLY JAVA IS SECURED ! IT IS TIME TO REINSTALL AND ENABLE JAVA AGAIN

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Исправляем ошибку “Application blocked by java security” в браузере

Порой, когда вы пытаетесь зайти на тот или иной сайт или запустить какое – либо веб приложение, можно увидеть ошибку блокировки приложения службой безопасности Java. Выглядит она так:

Вид ошибки “Application blocked by java security”

В данной статье мы разберемся что она означает и как ее можно исправить.

Что означает эта ошибка?

Появление “Application blocked by java security” связано с тем, что встроенный в java машину механизм самозащиты обнаружил подозрительную активность того или иного приложения (сайта) в браузере и в целях безопасности заблокировал ее дальнейшее выполнение.

Далеко не всегда появление данной ошибки связано с реальной угрозой. Зачастую имеют место быть и ложные срабатывания. Поэтому если вы уверены в надежности сайта на котором появляется ошибка или у вас на компьютере установлен антивирус, то решить данную проблему можно банальным добавлением сайта в исключения Java. О том, как это сделать читаем далее.

Как исправить “Application blocked by java security”?

Для этого заходим в панель управления, находим там пункт “Java” и жмем по нему левой кнопкой мыши.

Далее в открывшемся окне переходим на вкладку “Security”.

Вход в редактор списка сайтов – исключений

Здесь нажимаем на кнопку “Edit Site List…” чтобы открыть редактор списка сайтов – исключений. Сайты из этого списка относятся к доверенным и не проверяются службой безопасности Java.

Во вновь открывшемся окне выбираем “Add” чтобы добавить сайт, на котором появляется ошибка “Application blocked by java security”.

Добавление сайта в исключения Java

Списываем или просто копируем адрес сайта и снова жмем “Add”.

Если появляется окно с предупреждением, то нажимаем на “Continue”.

После этого во всех открытых окнах выбираем “Ок”, перезапускаем браузер и пробуем открывать сайт на котором появлялась ошибка. Больше ее быть не должно.

Лучшая благодарность автору — репост к себе на страничку:

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How to disable the Java «Security Warning» popup?

Is there a way to disable this Java Security popup? I only use sites on my intranet and each page is home to 40+ applets that generate a new ID with each load. Because of this, every time the page is visited it requires you to click «Run» 40+ times. OS: Windows 7 Browser: IE 10 Here is my fix:

1. Open Internet Explorer
2. Click on Tools and select Internet Options
3. Click on Security tab and Click the ‘Custom Level’ button
4. In the ‘Miscellaneous’ section change “Display mixed content” to Enable.

This can be handled by adjusting the security settings on the Java Windows Control Panel applet. Since you didn’t indicate which operating system I must assume Windows.

Using IE 10 on Windows 7. This computer only accesses the local network and has no connection to the internet or other PCs, it connections to building monitoring tools.

Did you try adjusting the security level in the control panel? For me, it doesn’t work at all (level is constantly reset), but maybe you’ll have more luck.

@kinokijuf The OP specifically mentioned Windows 7 three comments above. Please don’t change the meaning of others’ posts. Thanks.

7 Answers 7

Put a text document in this location named deployment.properties c:\windows\sun\Java\deployment\deployment.properties

Despite what Java documentation says, you do not need the deployment.config file unless you want to use the manditory setting.

This file will change the default for every user on the computer, even if they already have a deployment.properties file in their appdata folder. You can verify that the settings are taking effect when you open the java 32 control panel since it reads the settings then.

Here are some of the things we put in our deployment.properties file.

#disables the java desktop shortcut on install - might not be required for modern versions deployment.javaws.shortcut="NEVER" #tells sets security level to it's minimum "MEDIUM" to allow for apps to run on outdated java versions deployment.security.level=MEDIUM #disabled certificate checking so that java apps load much faster. Java still checks the certificate #blacklist though so the certificate is still used. deployment.security.validation.ocsp=true #moves the user trusted certificates store to a shared location so we can pre-approve controls deployment.user.security.trusted.certs=C\:\\Program Files\\Java\\jre7\\security\\trusted.certs 

The last bit is the best way to get rid of «do you want to run this app» boxes. Once you set the trusted.certs location to a shared location, create your own trusted.certs file by manually going to the process of checking the box «don’t show this again». They deploy this trusted.certs file to all your machines with this deployment.properties file and viola, no more security pop-ups.

Note that the extra slashes in the path are required. Colons are reserved characters and the backslash is the escape character.

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