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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200507-05">
<title>zlib: Buffer overflow</title>
<synopsis>
A buffer overflow has been discovered in zlib, potentially resulting in the
execution of arbitrary code.
</synopsis>
<product type="ebuild">zlib</product>
<announced>July 06, 2005</announced>
<revised>July 06, 2005: 01</revised>
<bug>98121</bug>
<access>remote</access>
<affected>
<package name="sys-libs/zlib" auto="yes" arch="*">
<unaffected range="ge">1.2.2-r1</unaffected>
<vulnerable range="lt">1.2.2-r1</vulnerable>
</package>
</affected>
<background>
<p>
zlib is a widely used free and patent unencumbered data
compression library.
</p>
</background>
<description>
<p>
Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a
buffer overflow in zlib. A bounds checking operation failed to take
invalid data into account, allowing a specifically malformed deflate
data stream to overrun a buffer.
</p>
</description>
<impact type="high">
<p>
An attacker could construct a malformed data stream, embedding it
within network communication or an application file format, potentially
resulting in the execution of arbitrary code when decoded by the
application using the zlib library.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All zlib users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=sys-libs/zlib-1.2.2-r1&quot;</code>
</resolution>
<references>
<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2096">CAN-2005-2096</uri>
</references>
<metadata tag="submitter" timestamp="Mon, 04 Jul 2005 06:51:26 +0000">
taviso
</metadata>
<metadata tag="bugReady" timestamp="Wed, 06 Jul 2005 14:21:00 +0000">
koon
</metadata>
</glsa>