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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200504-04">
<title>mit-krb5: Multiple buffer overflows in telnet client</title>
<synopsis>
The mit-krb5 telnet client is vulnerable to two buffer overflows, which
could allow a malicious telnet server operator to execute arbitrary code.
</synopsis>
<product type="ebuild">telnet</product>
<announced>April 06, 2005</announced>
<revised>April 06, 2005: 01</revised>
<bug>87145</bug>
<access>remote</access>
<affected>
<package name="app-crypt/mit-krb5" auto="yes" arch="*">
<unaffected range="ge">1.3.6-r2</unaffected>
<vulnerable range="lt">1.3.6-r2</vulnerable>
</package>
</affected>
<background>
<p>
The MIT Kerberos 5 implementation provides a command line telnet
client which is used for remote login via the telnet protocol.
</p>
</background>
<description>
<p>
A buffer overflow has been identified in the env_opt_add()
function, where a response requiring excessive escaping can cause a
heap-based buffer overflow. Another issue has been identified in the
slc_add_reply() function, where a large number of SLC commands can
overflow a fixed size buffer.
</p>
</description>
<impact type="normal">
<p>
Successful exploitation would require a vulnerable user to connect
to an attacker-controlled telnet host, potentially executing arbitrary
code with the permissions of the telnet user on the client.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All mit-krb5 users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-crypt/mit-krb5-1.3.6-r2&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468">CAN-2005-0468</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469">CAN-2005-0469</uri>
<uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2005-001-telnet.txt">MITKRB5-SA-2005-001</uri>
</references>
<metadata tag="submitter" timestamp="Fri, 1 Apr 2005 09:42:26 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Wed, 6 Apr 2005 09:05:02 +0000">
koon
</metadata>
</glsa>