Difference between revisions of "Security FAQ"

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==How do I report a security issue?==
 
==How do I report a security issue?==
  
Please create a new issue in the [http://tracker.moodle.org Moodle Tracker] describing the problem in detail. (You'll need a tracker account in order to create a new issue.) Set the security level to "Serious security issue", then only the security team (led by Petr Skoda) and yourself as the reporter will be able to view it.
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See [[:dev:Moodle security procedures|Moodle security procedures]] in the dev docs for details on how to report a security issue.
  
 
Previously fixed security issues are listed in the [http://moodle.org/security/ Moodle.org Security news]. If you are unsure whether a problem has been fixed or not, it's best to report it anyway.
 
Previously fixed security issues are listed in the [http://moodle.org/security/ Moodle.org Security news]. If you are unsure whether a problem has been fixed or not, it's best to report it anyway.
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==How can I keep my site secure?==
 
==How can I keep my site secure?==
  
It's good practice to always use the latest stable release of the version you are using. [[CVS for Administrators|CVS]] is a very easy way to do this.
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It's good practice to always use the latest stable release of the version you are using. It is safe to upgrade to a more recent version on the branch you are using, say from Moodle 2.X.1 to the latest version on the 2.X branch. [[Git for Administrators|Downloading via Git]] makes it very easy way to do this.
  
 
==How do I keep track of recent security issues?==
 
==How do I keep track of recent security issues?==
  
* Register your [http://moodle.org/sites Moodle sites] with moodle.org (visit admin/index.php in your installation to see the registration button), making sure to enable the option of being notified about security issues and updates. After your registration is accepted, your email address will be automatically added to our low-volume securityalerts mailing list.
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* [[Site registration | Register your Moodle site with moodle.org]], making sure to enable the option of being notified about security issues and updates. After your registration is accepted, your email address will be automatically added to our low-volume security alerts mailing list.
  
* Eventually, all important security issues are published to the general public via the [http://moodle.org/mod/forum/view.php?f=996 Moodle Security forum]. You can subscribe to the [http://moodle.org/rss/file.php/1/1/forum/996/rss.xml forum RSS feed] to automatically add new issues in your favourite feed reader or portal. You can also follow [http://twitter.com/moodlesecurity moodlesecurity on Twitter].
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* Eventually, all important security issues are published to the general public via the [http://moodle.org/mod/forum/view.php?f=996 Moodle Security forum]. You can subscribe to the forum or [http://twitter.com/moodlesecurity follow moodlesecurity on Twitter].
  
 
==Who is able to view security issues in the Tracker?==
 
==Who is able to view security issues in the Tracker?==
  
Depending upon the security level of a Tracker issue, access is restricted to developers, testers or members of the security team.
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Depending upon the security level of a Tracker issue, access is restricted to developers, testers or members of the security team. Specific details are available in the [[dev:Tracker guide#When_creating_an_issue|Security Level field description in the Tracker guide]].
 
 
If you wish to find out which files have been changed and what lines of code have been added/amended for a particular security issue you can search cvs for the issue number. However, please note that the recent security fixes for 1.9.7 and 1.8.11 would be extremely complex to back-port to 1.9.6 or 1.8.10 and virtually impossible to back-port to earlier versions. Thus, upgrading is really the recommended solution.
 
  
 
==Which versions of Moodle are supported?==
 
==Which versions of Moodle are supported?==
  
* As stated on [http://download.moodle.org/ download.moodle.org], Moodle 1.8 and 1.9 are supported. If you're still using 1.6 or 1.7 then upgrading is highly recommended.
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Currently supported versions are listed on [http://download.moodle.org/ download.moodle.org].
* The latest development branch of Moodle is not intended for production use and while security problems are fixed, security announcements are not issued. If you are using the development branch for testing or evaluation, we assume that you will update your code regularly.
 
* Our security officer Petr Škoda oversees the security of the code found in the standard Moodle distribution. The security of contributed code lies with the individual maintainers.
 
  
 
==My site was hacked. What do I do?==
 
==My site was hacked. What do I do?==
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#Obtain a reCAPTCHA key from http://recaptcha.net by [https://admin.recaptcha.net/accounts/signup/?next= signing up for an account] (free) then entering a domain.
 
#Obtain a reCAPTCHA key from http://recaptcha.net by [https://admin.recaptcha.net/accounts/signup/?next= signing up for an account] (free) then entering a domain.
#Copy and paste the public and private keys provided into the ''recaptchapublickey'' and ''recaptchaprivatekey'' fields in the manage authentication common settings in ''Administration > Users > Authentication > [[Manage authentication]]''.
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#Copy and paste the public and private keys provided into the ''recaptchapublickey'' and ''recaptchaprivatekey'' fields in the manage authentication common settings in ''Administration > Plugins > Authentication > [[Manage authentication]]''.
 
#Click the "Save changes" button at the bottom of the page.
 
#Click the "Save changes" button at the bottom of the page.
#Follow the settings link for email-based self-registration in ''Administration > Users > Authentication > Manage authentication'' and enable the reCAPTCHA element.
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#Follow the settings link for email-based self-registration in ''Administration > Plugins > Authentication > Manage authentication'' and enable the reCAPTCHA element.
 
#Click the "Save changes" button at the bottom of the page.
 
#Click the "Save changes" button at the bottom of the page.
  
 
==How can I run the security overview report?==
 
==How can I run the security overview report?==
  
To run the new [[Security overview|security overview report]], you need to be using Moodle 1.8.9 or 1.9.4. The report can be accessed via ''Administration > Reports > Security overview''.
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To run the [[Security overview|security overview report]], go to ''Administration > Site administration > Reports > Security overview''.
  
==How can I enable password salting?==
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== I have discovered Cross Site Scripting (XSS) is possible with Moodle ==
  
Moodle stores passwords as md5 strings. Password salting adds information to these strings to make them practically impossible to reverse. See [[Password salting]] for details of how to enable this feature.
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Some forms of rich content used by teachers to enhance their courses use the same technologies that malicious users can use for cross-site scripting attacks. If Moodle was solely concerned with security, it would not allow this. However, Moodle is also concerned with education and so a balance has to be struck between securing the system and supporting teachers with their needs.
  
==What if I lose my password salt?==
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In order to strike a balance between authoring rich educational content and securing the system, access to post XSS-capable content is controlled by capabilites flagged with the 'XSS risk' - see [[Risks]]. In general this means that admins and teachers can post XSS-capable content, but students can not - see [[XSS_trusted_users]].
  
If you lose your password salt, then you and all other site users will have to go through password recovery to reset your passwords. To prevent this situation from occuring, you should keep a note of your password salt somewhere other than config.php.
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Occasionally security bugs are discovered in Moodle's handling of XSS capable content and we are greatful to the community for reporting these through [https://docs.moodle.org/dev/Moodle_security_procedures responsible disclosure].  Before reporting an XSS bug to Moodle, please ensure that the user posting the XSS content does not have capabilities flagged with the XSS risk.
  
 
==See also==
 
==See also==
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* Using Moodle [http://moodle.org/mod/forum/view.php?id=7301 Security and Privacy forum]
 
* Using Moodle [http://moodle.org/mod/forum/view.php?id=7301 Security and Privacy forum]
  
Using Moodle forum discussions:
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[[Category:FAQ]]
* [http://moodle.org/mod/forum/discuss.php?d=124063 Trojan:JS Type Obfuscation Exploits]
 
  
[[Category:FAQ]]
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[[es:Seguridad FAQ]]
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[[fr: FAQ sur la sécurité]]

Latest revision as of 06:43, 23 May 2019

How do I report a security issue?

See Moodle security procedures in the dev docs for details on how to report a security issue.

Previously fixed security issues are listed in the Moodle.org Security news. If you are unsure whether a problem has been fixed or not, it's best to report it anyway.

How can I keep my site secure?

It's good practice to always use the latest stable release of the version you are using. It is safe to upgrade to a more recent version on the branch you are using, say from Moodle 2.X.1 to the latest version on the 2.X branch. Downloading via Git makes it very easy way to do this.

How do I keep track of recent security issues?

  • Register your Moodle site with moodle.org, making sure to enable the option of being notified about security issues and updates. After your registration is accepted, your email address will be automatically added to our low-volume security alerts mailing list.

Who is able to view security issues in the Tracker?

Depending upon the security level of a Tracker issue, access is restricted to developers, testers or members of the security team. Specific details are available in the Security Level field description in the Tracker guide.

Which versions of Moodle are supported?

Currently supported versions are listed on download.moodle.org.

My site was hacked. What do I do?

See Hacked site recovery.

How can I reduce spam in Moodle?

See Reducing spam in Moodle.

How can I increase privacy in Moodle?

See Increasing privacy in Moodle.

How do I enable reCAPTCHA?

To add spam protection to the Email-based self-registration new account form with a CAPTCHA element:

  1. Obtain a reCAPTCHA key from http://recaptcha.net by signing up for an account (free) then entering a domain.
  2. Copy and paste the public and private keys provided into the recaptchapublickey and recaptchaprivatekey fields in the manage authentication common settings in Administration > Plugins > Authentication > Manage authentication.
  3. Click the "Save changes" button at the bottom of the page.
  4. Follow the settings link for email-based self-registration in Administration > Plugins > Authentication > Manage authentication and enable the reCAPTCHA element.
  5. Click the "Save changes" button at the bottom of the page.

How can I run the security overview report?

To run the security overview report, go to Administration > Site administration > Reports > Security overview.

I have discovered Cross Site Scripting (XSS) is possible with Moodle

Some forms of rich content used by teachers to enhance their courses use the same technologies that malicious users can use for cross-site scripting attacks. If Moodle was solely concerned with security, it would not allow this. However, Moodle is also concerned with education and so a balance has to be struck between securing the system and supporting teachers with their needs.

In order to strike a balance between authoring rich educational content and securing the system, access to post XSS-capable content is controlled by capabilites flagged with the 'XSS risk' - see Risks. In general this means that admins and teachers can post XSS-capable content, but students can not - see XSS_trusted_users.

Occasionally security bugs are discovered in Moodle's handling of XSS capable content and we are greatful to the community for reporting these through responsible disclosure. Before reporting an XSS bug to Moodle, please ensure that the user posting the XSS content does not have capabilities flagged with the XSS risk.

See also