tomcat7 - security update

Multiple security issues were found in the Tomcat servlet and JSP engine:

• CVE-2013-2067
  FORM authentication associates the most recent request requiring
  authentication with the current session. By repeatedly sending a request
  for an authenticated resource while the victim is completing the login
  form, an attacker could inject a request that would be executed using the
  victim’s credentials.
• CVE-2013-2071
  A runtime exception in AsyncListener.onComplete() prevents the request from
  being recycled. This may expose elements of a previous request to a current
  request.
• CVE-2013-4286
  Reject requests with multiple content-length headers or with a content-length
  header when chunked encoding is being used.
• CVE-2013-4322
  When processing a request submitted using the chunked transfer encoding,
  Tomcat ignored but did not limit any extensions that were included. This allows
  a client to perform a limited denial of service by streaming an unlimited amount
  of data to the server.
• CVE-2014-0050
  Multipart requests with a malformed Content-Type header could trigger an
  infinite loop causing a denial of service.

For the stable distribution (wheezy), these problems have been fixed in
version 7.0.28-4+deb7u1.

For the testing distribution (jessie), these problems have been fixed in
version 7.0.52-1.

For the unstable distribution (sid), these problems have been fixed in
version 7.0.52-1.

We recommend that you upgrade your tomcat7 packages.