DOS Vulnerability in Ruby REXML

[Neil Wilson]

Binary package hint: libruby1.8

There is a new vulnerability in Ruby reported over the weekend.

http://www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml/

There is a monkey patch fix available (http://www.ruby-lang.org/security/20080823rexml/rexml-expansion-fix.rb) but it really needs to go in the libraries.

1.8 series

    * 1.8.6-p287 and all prior versions
    * 1.8.7-p72 and all prior versions

1.9 series

    * all versions

[Serge (serge-de-souza)]

CVE-2008-3790

[Brian Wang (dingting)]

FYI, there's a proof of concept exploit here:

http://www.securityfocus.com/data/vulnerabilities/exploits/30802.rb

[Jamie Strandboge (jdstrand)]

Intrepid now has 1.8.7.72-1

[Launchpad Janitor (janitor)]

This bug was fixed in the package ruby1.8 - 1.8.6.111-2ubuntu1.2

---------------
ruby1.8 (1.8.6.111-2ubuntu1.2) hardy-security; urgency=low

  * SECURITY UPDATE: denial of service via resource exhaustion in the REXML
    module (LP: #261459)
    - debian/patches/102_CVE-2008-3790.dpatch: adjust rexml/document.rb and
      rexml/entity.rb to use expansion limits
    - CVE-2008-3790
  * SECURITY UPDATE: integer overflow in rb_ary_fill may cause denial of
    service (LP: #246818)
    - debian/patches/103_CVE-2008-2376.dpatch: adjust array.c to properly
      check argument length
    - CVE-2008-2376
  * SECURITY UPDATE: denial of service via multiple long requests to a Ruby
    socket
    - debian/patches/104_CVE-2008-3443.dpatch: adjust regex.c to not use ruby
      managed memory and check for allocation failures
    - CVE-2008-3443
  * SECURITY UPDATE: denial of service via crafted HTTP request (LP: #257122)
    - debian/patches/105_CVE-2008-3656.dpatch: update webrick/httputils.rb to
      properly check paths ending with '.'
    - CVE-2008-3656
  * SECURITY UPDATE: predictable transaction id and source port for DNS
    requests (separate vulnerability from CVE-2008-1447)
    - debian/patches/106_CVE-2008-3905.dpatch: adjust resolv.rb to use
      SecureRandom for transaction id and source port
    - CVE-2008-3905
  * SECURITY UPDATE: safe level bypass via DL.dlopen
    - debian/patches/107_CVE-2008-3657.dpatch: adjust rb_str_to_ptr and
      rb_ary_to_ptr in ext/dl/dl.c and rb_dlsym_call in ext/dl/sym.c to
      propogate taint and check taintness of DLPtrData
    - CVE-2008-3657
  * SECURITY UPDATE: safe level bypass via multiple vectors
    - debian/patches/108_CVE-2008-3655.dpatch: use rb_secure(4) in variable.c
      and syslog.c, check for secure level 3 or higher in eval.c and make
      sure PROGRAM_NAME can't be modified
    - CVE-2008-3655

 -- Jamie Strandboge <email address hidden> Tue, 07 Oct 2008 13:34:00 -0500

[Launchpad Janitor (janitor)]

This bug was fixed in the package ruby1.8 - 1.8.6.36-1ubuntu3.3

---------------
ruby1.8 (1.8.6.36-1ubuntu3.3) gutsy-security; urgency=low

  * SECURITY UPDATE: denial of service via resource exhaustion in the REXML
    module (LP: #261459)
    - debian/patches/103_CVE-2008-3790.dpatch: adjust rexml/document.rb and
      rexml/entity.rb to use expansion limits
    - CVE-2008-3790
  * SECURITY UPDATE: integer overflow in rb_ary_fill may cause denial of
    service (LP: #246818)
    - debian/patches/104_CVE-2008-2376.dpatch: adjust array.c to properly
      check argument length
    - CVE-2008-2376
  * SECURITY UPDATE: denial of service via multiple long requests to a Ruby
    socket
    - debian/patches/105_CVE-2008-3443.dpatch: adjust regex.c to not use ruby
      managed memory and check for allocation failures
    - CVE-2008-3443
  * SECURITY UPDATE: denial of service via crafted HTTP request (LP: #257122)
    - debian/patches/106_CVE-2008-3656.dpatch: update webrick/httputils.rb to
      properly check paths ending with '.'
    - CVE-2008-3656
  * SECURITY UPDATE: predictable transaction id and source port for DNS
    requests (separate vulnerability from CVE-2008-1447)
    - debian/patches/107_CVE-2008-3905.dpatch: adjust resolv.rb to use
      SecureRandom for transaction id and source port
    - CVE-2008-3905
  * SECURITY UPDATE: safe level bypass via DL.dlopen
    - debian/patches/108_CVE-2008-3657.dpatch: adjust rb_str_to_ptr and
      rb_ary_to_ptr in ext/dl/dl.c and rb_dlsym_call in ext/dl/sym.c to
      propogate taint and check taintness of DLPtrData
    - CVE-2008-3657
  * SECURITY UPDATE: safe level bypass via multiple vectors
    - debian/patches/109_CVE-2008-3655.dpatch: use rb_secure(4) in variable.c
      and syslog.c, check for secure level 3 or higher in eval.c and make
      sure PROGRAM_NAME can't be modified
    - CVE-2008-3655

 -- Jamie Strandboge <email address hidden> Thu, 09 Oct 2008 08:47:35 -0500

[Jamie Strandboge (jdstrand)]

http://www.ubuntu.com/usn/usn-651-1