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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200504-01">
<title>telnet-bsd: Multiple buffer overflows</title>
The telnet-bsd 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 01, 2005</announced>
<revised>April 01, 2005: 01</revised>
<package name="net-misc/telnet-bsd" auto="yes" arch="*">
<unaffected range="ge">1.0-r1</unaffected>
<vulnerable range="lt">1.0-r1</vulnerable>
telnet-bsd provides a command line telnet client which is used for
remote login using the telnet protocol.
A buffer overflow has been identified in the env_opt_add()
function of telnet-bsd, 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 host using telnet, potentially executing
arbitrary code with the permissions of the telnet user.
There is no known workaround at this time.
All telnet-bsd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/telnet-bsd-1.0-r1&quot;</code>
<uri link="">CAN-2005-0468</uri>
<uri link=";type=vulnerabilities">IDEF0867</uri>
<uri link="">CAN-2005-0469</uri>
<uri link=";type=vulnerabilities">IDEF0866</uri>
<metadata tag="requester" timestamp="Tue, 29 Mar 2005 16:15:13 +0000">
<metadata tag="submitter" timestamp="Tue, 29 Mar 2005 17:09:56 +0000">
<metadata tag="bugReady" timestamp="Thu, 31 Mar 2005 06:01:07 +0000">