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Gentoo Linux Security Advisory GLSA 200504-01 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: telnet-bsd: Multiple buffer overflows |
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Date: April 01, 2005 |
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Bugs: #87019 |
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ID: 200504-01 |
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Synopsis |
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======== |
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|
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The telnet-bsd telnet client is vulnerable to two buffer overflows, |
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which could allow a malicious telnet server operator to execute |
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arbitrary code. |
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Background |
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========== |
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|
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telnet-bsd provides a command line telnet client which is used for |
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remote login using the telnet protocol. |
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/telnet-bsd < 1.0-r1 >= 1.0-r1 |
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|
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Description |
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=========== |
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|
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A buffer overflow has been identified in the env_opt_add() function of |
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telnet-bsd, where a response requiring excessive escaping can cause a |
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heap-based buffer overflow. Another issue has been identified in the |
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slc_add_reply() function, where a large number of SLC commands can |
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overflow a fixed size buffer. |
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|
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Impact |
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====== |
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|
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Successful exploitation would require a vulnerable user to connect to |
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an attacker-controlled host using telnet, potentially executing |
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arbitrary code with the permissions of the telnet user. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All telnet-bsd users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/telnet-bsd-1.0-r1" |
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References |
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========== |
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[ 1 ] CAN-2005-0468 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468 |
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[ 2 ] IDEF0867 |
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http://www.idefense.com/application/poi/display?id=221&type=vulnerabilities |
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[ 3 ] CAN-2005-0469 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469 |
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[ 4 ] IDEF0866 |
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http://www.idefense.com/application/poi/display?id=220&type=vulnerabilities |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200504-01.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2005 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.0 |
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