Date: Fri, 05 Jul 2013 13:12:46 -0600 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com CC: Marcus Meissner <meissner@...e.de>, "Steven M. Christey" <coley@...re.org> Subject: Re: CVE Request: libxml2 external parsed entities issue -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/05/2013 08:38 AM, Marcus Meissner wrote: > On Fri, Jul 05, 2013 at 09:30:07AM -0400, Marc Deslauriers wrote: >> On 13-07-05 09:17 AM, Marcus Meissner wrote: >>> On Fri, Jul 05, 2013 at 08:48:04AM -0400, Marc Deslauriers >>> wrote: >>>> Hello, >>>> >>>> libxml2 earlier than 2.9.0 fetches external parsed entities >>>> by default, with no way to disable the behaviour. >>>> >>>> Fixed by the following commit: >>>> >>>> https://git.gnome.org/browse/libxml2/commit/?id=4629ee02ac649c27f9c0cf98ba017c6b5526070f >>>> >>>> >>>> More Information: >>>> https://mail.gnome.org/archives/xml/2012-October/msg00045.html >>>> >>>> https://github.com/sparklemotion/nokogiri/issues/693 >>>> https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/1194410 >>>> >>>> >>>> >>>> Could a CVE please be assigned to this issue? >>> >>> Sounds like http://seclists.org/oss-sec/2013/q1/391 and "Please >>> use CVE-2013-0339 for libxml2 external entities expansion" >>> >>> ? >>> >> >> Hrm, I would have thought CVE-2013-0339 was for the entities >> expansion DoS issue fixed by this commit: >> >> https://git.gnome.org/browse/libxml2/commit/?id=23f05e0c33987d6605387b300c4be5da2120a7ab >> >> >> The other one is for external entities expansion being enabled by default with >> no way to turn it off. You would lump them together? > > Mostly wondering, as it seemed more or less related. Perhaps > someone else has more insight. > > Ciao, Marcus So the emails covering this: http://www.openwall.com/lists/oss-security/2013/04/12/6 CVE-2013-0338 - libxml2 internal entity expansion CVE-2013-0339 - libxml2 external entities expansion For CVE-2013-0340 and CVE-2013-0339, there are "workarounds" available for application developers, although such workarounds may be very expensive to develop, and this might place "too much" responsibility to the developers - so, these assignments may still be OK. It is still worth discussion. So same problem, just a new (better) fix is my take, Steve, does that work for you as well? - -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iQIcBAEBAgAGBQJR1xquAAoJEBYNRVNeJnmTfQwQAJGm8zXjmI5zOPtYsl6BX2T5 5KSQ7ZkfB7iEaaHEtiZPnocXlf0No7jpq6VtMqdoiTQ3mzCXiMvs7Cev6jg9EeA7 OnHu7Z7C/m5ZAwxdclwJ+83TjtSKcf/Yz1K6vRIAlTeh+cDWhqWGIW/48bX54KTh Uj+8oW7ka101ZLaycA8y0UwPsiz9vzrHAonDSn09CcUI7AhxgsLTKOHIl0UgGIZi WHNw5rQaxxXtEkyVh4Y0lsn1mqvJv8kSjaRUQ+dH9bv8ToIzGYbm6NLdJtcXl7FX +IIxhhWpvJnYaTnqazzN0GFT55AmFf8x6Fu4FPrbW3Pc5S6UdRBVjjdm/Vs3TFr8 IBDoSp0nqGkIr2Wx9n8BfZeRb7sAUkGZm3l4enue7W9HwQghdzsTyZrL+9xtHO+B 0YGuo4r+DxFyGMnsyU7m1oXQoCvALp02KPBpr566dKpZ7MFxyim/h8dUxRCO+7R6 8pVI7icFb+lKfimQryqgclXmmDaFCmikbHwZ+v+J1CrB4yQ3I0JLo7pxi5mNtEvx uqU9xvlGZpJiWjDnIRAe4JPgKTqu2AHOQXJv9ITXW1T7E9w9JrB+b14gwM965HT4 UkPH9OusLZFFp+PBK8CyZAzQ/yOCfoFxkW9DtvWif5CGHORLos01lLogZdITQ7Eq Kf9QNiB0vbB51dKcpqPt =xLit -----END PGP SIGNATURE-----
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