Apache Tomcat

This page lists all security vulnerabilities fixed in released versions of Apache Tomcat 6.x. Each vulnerability is given a security impact rating by the Apache Tomcat security team - please note that this rating may vary from platform to platform. We also list the versions of Apache Tomcat the flaw is known to affect, and where a flaw has not been verified list the version with a question mark.

This page has been created from a review of the Apache Tomcat archives and the CVE list. Please send comments or corrections for these vulnerabilities to the Tomcat Security Team.

important: Information disclosure CVE-2007-5461

When Tomcat's WebDAV servlet is configured for use with a context and has been enabled for write, some WebDAV requests that specify an entity with a SYSTEM tag can result in the contents of arbitary files being returned to the client.

Affects: 6.0.0-6.0.14

low: Cross-site scripting CVE-2007-2449

JSPs within the examples web application did not escape user provided data before including it in the output. This enabled a XSS attack. These JSPs now filter the data before use. This issue may be mitigated by undeploying the examples web application. Note that it is recommended that the examples web application is not installed on a production system.

Affects: 6.0.0-6.0.13

low: Cross-site scripting CVE-2007-2450

The Manager and Host Manager web applications did not escape user provided data before including it in the output. This enabled a XSS attack. These applciations now filter the data before use. This issue may be mitigated by logging out (closing the browser) of the application once the management tasks have been completed.

Affects: 6.0.0-6.0.13

low: Session hi-jacking CVE-2007-3382

Tomcat incorrectly treated a single quote character (') in a cookie value as a delimiter. In some circumstances this lead to the leaking of information such as session ID to an attacker.

Affects: 6.0.0-6.0.13

low: Session hi-jacking CVE-2007-3385

Tomcat incorrectly handled the character sequence \" in a cookie value. In some circumstances this lead to the leaking of information such as session ID to an attacker.

Affects: 6.0.0-6.0.13

low: Cross-site scripting CVE-2007-3386

The Host Manager Servlet did not filter user supplied data before display. This enabled an XSS attack.

Affects: 6.0.0-6.0.13

moderate: Cross-site scripting CVE-2007-1355

The JSP and Servlet included in the sample application within the Tomcat documentation webapp did not escape user provided data before including it in the output. This enabled a XSS attack. These pages have been simplified not to use any user provided data in the output.

Affects: 6.0.0-6.0.10

important: Information disclosure CVE-2005-2090

Requests with multiple content-length headers should be rejected as invalid. When multiple components (firewalls, caches, proxies and Tomcat) process a sequence of requests where one or more requests contain multiple content-length headers and several components do not reject the request and make different decisions as to which content-length leader to use an attacker can poision a web-cache, perform an XSS attack and obtain senstive information from requests other then their own. Tomcat now returns 400 for requests with multiple content-length headers.

Affects: 6.0.0-6.0.10

important: Directory traversal CVE-2007-0450

Tomcat permits '\', '%2F' and '%5C' as path delimiters. When Tomcat is used behind a proxy (including, but not limited to, Apache HTTP server with mod_proxy and mod_jk) configured to only proxy some contexts, a HTTP request containing strings like "/\../" may allow attackers to work around the context restriction of the proxy, and access the non-proxied contexts.

The following Java system properties have been added to Tomcat to provide additional control of the handling of path delimiters in URLs (both options default to false):

• org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH: true|false
• org.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH: true|false

Due to the impossibility to guarantee that all URLs are handled by Tomcat as they are in proxy servers, Tomcat should always be secured as if no proxy restricting context access was used.

Affects: 6.0.0-6.0.9

low: Cross-site scripting CVE-2007-1358

Web pages that display the Accept-Language header value sent by the client are susceptible to a cross-site scripting attack if they assume the Accept-Language header value conforms to RFC 2616. Under normal circumstances this would not be possible to exploit, however older versions of Flash player were known to allow carefully crafted malicious Flash files to make requests with such custom headers. Tomcat now ignores invalid values for Accept-Language headers that do not conform to RFC 2616.

Affects: 6.0.0-6.0.5