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Message-ID: <20131105202456.GZ2471@redhat.com> Date: Tue, 5 Nov 2013 13:24:56 -0700 From: Vincent Danen <vdanen@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: CVE Request: additional fix for CVE-2012-2825 libxslt crash * [2013-11-05 13:50:09 +0100] Marcus Meissner wrote: >Our QA found that the reproducer in CVE-2012-2825 (magic.xsl and magic.xml) >also expose another libxslt crash in older libxslt versions. > >https://bugzilla.novell.com/show_bug.cgi?id=849019 > >This bug was fixed in libxslt 1.1.25 with this commit: >https://gitorious.org/libxslt/libxslt/commit/7089a62b8f133b42a2981cf1f920a8b3fe9a8caa > >commit 7089a62b8f133b42a2981cf1f920a8b3fe9a8caa >Author: Martin <gzlist@...glemail.com> >Date: Wed Sep 16 19:02:16 2009 +0200 > > Crash compiling stylesheet with DTD > > * libxslt/xslt.c: when a stylesheet embbeds a DTD the compilation > process could get seriously wrong > >Crash as a xmlDtd struct is accessed as a xmlNode, not really attacker controllable >I would say, but a denial of service (crash). As you probably saw, I commented in your bug regarding this and now that I've seen this I did some further digging. The reason this doesn't crash for me on Red Hat Enterprise Linux 5 which ships 1.1.17 is because we included this patch (well, the developer did) a day after the initial build with the comment: - CVE-2012-2825 requires an extra patch on 1.1.17 So, I think this does require a second CVE. This also explains why I didn't see any crashes with our updated packages because we already have this patch. -- Vincent Danen / Red Hat Security Response Team
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