Bug 673101 – CVE-2010-4657 php: XMLWriter information leak

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Bug 673101 - (CVE-2010-4657) CVE-2010-4657 php: XMLWriter information leak

Summary:	CVE-2010-4657 php: XMLWriter information leak

Status:	NEW

Aliases:	CVE-2010-4657

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	Unspecified Unspecified

Priority	low Severity low
Target Milestone:	---
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Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	public=20101006,reported=20110124,sou...
Keywords:	Security

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Reported:	2011-01-27 07:52 EST by Tomas Hoger
Modified:	2015-07-31 02:37 EDT (History)
CC List:	6 users (show)

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Doc Type:	Bug Fix
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Description Tomas Hoger 2011-01-27 07:52:57 EST

Kees Cook reported an information leak flaw in the PHP's XMLWriter, triggered by an invalid UTF-8 string passed to the writeAttribute method:

  http://thread.gmane.org/gmane.comp.security.oss.general/4122
  http://bugs.php.net/bug.php?id=52998
  https://bugzilla.gnome.org/show_bug.cgi?id=631551

In the initial report, it was unclear if this is PHP or libxml2 flaw.  libxml2 upstream author's reply in the gnome bugzilla bug suggests this issue needs to be addressed in PHP, as the libxml2 API requires input to be valid UTF-8 and \0 terminated string.

Comment 1 Tomas Hoger 2011-01-27 07:55:34 EST

Testing with the reproducer in upstream PHP bug, this is reproducible with PHP 5.3 packages in RHEL-6 (php) and RHEL-5 (php53).  No visible leak on php (5.1.6) packages in RHEL-5.  XMLWriter was introduced in 5.1.2, hence RHEL-4 php is unaffected.

Comment 2 Josh Bressers 2011-08-25 11:17:42 EDT

Statement:

The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw the packages php53 php.

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