XML denial of service vulnerability

[Christian Kuersteiner]

libopenid-ruby is affected by a XML denial of service (Entity Expansion Attack / out of memory) attack.

See: https://github.com/openid/ruby-openid/pull/43

Patch:
https://github.com/openid/ruby-openid/commit/a3693cef06049563f5b4e4824f4d3211288508ed

[Marc Deslauriers (mdeslaur)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Since the package referred to in this bug is in universe or multiverse, it is community maintained. If you are able, I suggest coordinating with upstream and posting a debdiff for this issue. When a debdiff is available, members of the security team will review it and publish the package. See the following link for more information: https://wiki.ubuntu.com/SecurityTeam/UpdateProcedures

[Seth Arnold (seth-arnold)]

What's the relationship between this bug and bug https://bugs.launchpad.net/bugs/1190179 ?

[Christian Kuersteiner (ckuerste)]

It's the same vulnerability. As far as I see the package got renamed/moved from libopenid-ruby to ruby-openid on quantal. Since they are different packages I opened two bugs.

[Christian Kuersteiner (ckuerste)]

Lucid debdiff.

Tests done:
- Builds with pbuilder
- can install and upgrade cleanly
- Tested with examples/rails_openid: creation of new identity and verifying via second instance worked without a problem.

[Christian Kuersteiner (ckuerste)]

Precise debdiff.

Tests done:
- Builds with pbuilder
- can install and upgrade cleanly
- Tested with examples/rails_openid: creation of new identity worked without a problem. I could not start the second server with 'script/server --port=3001'. The application didn't understand the port part. The behaviour was the same for the patched and unpatched version.

[Launchpad Janitor (janitor)]

This bug was fixed in the package libopenid-ruby - 2.1.8debian-1ubuntu0.1

---------------
libopenid-ruby (2.1.8debian-1ubuntu0.1) precise-security; urgency=low

  * SECURITY UPDATE: XML denial of service attack (LP: #1190491)
    - debian/patches/02_CVE_2013_1812.patch: lib/openid/fetchers.rb,
      lib/openid/yadis/xrds.rb: limit fetching file size & disable XML entity
      expansion. Based on upstream patch.
    - CVE-2013-1812
 -- Christian Kuersteiner <email address hidden> Mon, 24 Jun 2013 10:04:38 +0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package libopenid-ruby - 2.1.7debian-1ubuntu0.1

---------------
libopenid-ruby (2.1.7debian-1ubuntu0.1) lucid-security; urgency=low

  * SECURITY UPDATE: XML denial of service attack (LP: #1190491)
    - debian/patches/CVE-2013-1812.patch: lib/openid/fetchers.rb,
      lib/openid/yadis/xrds.rb: limit fetching file size & disable XML entity
      expansion. Based on upstream patch.
    - CVE-2013-1812
 -- Christian Kuersteiner <email address hidden> Thu, 20 Jun 2013 15:51:01 +0700

[Seth Arnold (seth-arnold)]

Thanks Christian!

[Christian Kuersteiner (ckuerste)]

Quantal ruby-openid is already fixed through https://bugs.launchpad.net/ubuntu/+source/ruby-openid/+bug/1190179.