On 13 July 2011 14:28, <[email protected]> wrote:
> Author: markt
> Date: Wed Jul 13 13:28:24 2011
> New Revision: 1146005
>
> URL: http://svn.apache.org/viewvc?rev=1146005&view=rev
> Log:
> When running under a security manager and using sendfile, validate sendfile
> attributes to prevent sendfile being used to bypass the security manager.
> Part of the fix for CVE-2011-2526
>
> Modified:
> tomcat/trunk/java/org/apache/catalina/connector/LocalStrings.properties
> tomcat/trunk/java/org/apache/catalina/connector/Request.java
>
> Modified:
> tomcat/trunk/java/org/apache/catalina/connector/LocalStrings.properties
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/connector/LocalStrings.properties?rev=1146005&r1=1146004&r2=1146005&view=diff
> ==============================================================================
> --- tomcat/trunk/java/org/apache/catalina/connector/LocalStrings.properties
> (original)
> +++ tomcat/trunk/java/org/apache/catalina/connector/LocalStrings.properties
> Wed Jul 13 13:28:24 2011
> @@ -66,6 +66,7 @@ coyoteRequest.noLoginConfig=No authentic
> coyoteRequest.authenticate.ise=Cannot call authenticate() after the reponse
> has been committed
> coyoteRequest.uploadLocationInvalid=The temporary upload location [{0}] is
> not valid
> coyoteRequest.sessionEndAccessFail=Exception triggered ending access to
> session while recycling request
> +coyoteRequest.sendfileNotCanonical=Unable to determine canonical name of
> file [{0}] specified for use with sendfile
>
> requestFacade.nullRequest=The request object has been recycled and is no
> longer associated with this facade
>
>
> Modified: tomcat/trunk/java/org/apache/catalina/connector/Request.java
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/connector/Request.java?rev=1146005&r1=1146004&r2=1146005&view=diff
> ==============================================================================
> --- tomcat/trunk/java/org/apache/catalina/connector/Request.java (original)
> +++ tomcat/trunk/java/org/apache/catalina/connector/Request.java Wed Jul 13
> 13:28:24 2011
> @@ -1525,6 +1525,26 @@ public class Request
> return;
> }
>
> + // Do the security check before any updates are made
> + if (Globals.IS_SECURITY_ENABLED &&
> + name.equals("org.apache.tomcat.sendfile.filename")) {
IMO this "magic string" should be a constant - as is done earlier in the file:
... name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR) ...
> + // Use the canonical file name to avoid any possible symlink and
> + // relative path issues
> + String canonicalPath;
> + try {
> + canonicalPath = new
> File(value.toString()).getCanonicalPath();
> + } catch (IOException e) {
> + throw new SecurityException(sm.getString(
> + "coyoteRequest.sendfileNotCanonical", value), e);
> + }
> + // Sendfile is performed in Tomcat's security context so need to
> + // check if the web app is permitted to access the file while
> still
> + // in the web app's security context
> + System.getSecurityManager().checkRead(canonicalPath);
> + // Update the value so the canonical path is used
> + value = canonicalPath;
> + }
> +
> oldValue = attributes.put(name, value);
> if (oldValue != null) {
> replaced = true;
>
>
>
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