drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in telnet-bsd
Name: |
Pufferüberlauf in telnet-bsd
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ID: |
200504-01 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Sa, 2. April 2005, 13:00 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0468 |
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Applikationen: |
telnet-bsd |
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Originalnachricht |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200504-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: telnet-bsd: Multiple buffer overflows Date: April 01, 2005 Bugs: #87019 ID: 200504-01
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Synopsis ========
The telnet-bsd telnet client is vulnerable to two buffer overflows, which could allow a malicious telnet server operator to execute arbitrary code.
Background ==========
telnet-bsd provides a command line telnet client which is used for remote login using the telnet protocol.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/telnet-bsd < 1.0-r1 >= 1.0-r1
Description ===========
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 ======
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.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All telnet-bsd users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/telnet-bsd-1.0-r1"
References ==========
[ 1 ] CAN-2005-0468 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468 [ 2 ] IDEF0867
http://www.idefense.com/application/poi/display?id=221&type=vulnerabilities [ 3 ] CAN-2005-0469 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469 [ 4 ] IDEF0866
http://www.idefense.com/application/poi/display?id=220&type=vulnerabilities
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200504-01.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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