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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200504-04">
<title>mit-krb5: Multiple buffer overflows in telnet client</title>
The mit-krb5 telnet client is vulnerable to two buffer overflows, which
could allow a malicious telnet server operator to execute arbitrary code.
<product type="ebuild">telnet</product>
<announced>April 06, 2005</announced>
<revised>April 06, 2005: 01</revised>
<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>
The MIT Kerberos 5 implementation provides a command line telnet
client which is used for remote login via the telnet protocol.
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.
<impact type="normal">
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.
There is no known workaround at this time.
All mit-krb5 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-crypt/mit-krb5-1.3.6-r2&quot;</code>
<uri link="">CAN-2005-0468</uri>
<uri link="">CAN-2005-0469</uri>
<uri link="">MITKRB5-SA-2005-001</uri>
<metadata tag="submitter" timestamp="Fri, 1 Apr 2005 09:42:26 +0000">
<metadata tag="bugReady" timestamp="Wed, 6 Apr 2005 09:05:02 +0000">