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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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