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Gentoo Linux Security Advisory GLSA 200509-17 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Webmin, Usermin: Remote code execution through PAM |
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authentication |
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Date: September 24, 2005 |
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Bugs: #106705 |
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ID: 200509-17 |
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Synopsis |
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======== |
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|
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If Webmin or Usermin is configured to use full PAM conversations, it is |
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vulnerable to the remote execution of arbitrary code with root |
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privileges. |
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|
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Background |
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========== |
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|
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Webmin and Usermin are web-based system administration consoles. Webmin |
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allows an administrator to easily configure servers and other features. |
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Usermin allows users to configure their own accounts, execute commands, |
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and read e-mails. |
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|
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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 app-admin/webmin < 1.230 >= 1.230 |
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2 app-admin/usermin < 1.160 >= 1.160 |
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------------------------------------------------------------------- |
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2 affected packages on all of their supported architectures. |
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------------------------------------------------------------------- |
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|
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Description |
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=========== |
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|
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Keigo Yamazaki discovered that the miniserv.pl webserver, used in both |
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Webmin and Usermin, does not properly validate authentication |
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credentials before sending them to the PAM (Pluggable Authentication |
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Modules) authentication process. The default configuration shipped with |
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Gentoo does not enable the "full PAM conversations" option and is |
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therefore unaffected by this flaw. |
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|
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Impact |
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====== |
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|
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A remote attacker could bypass the authentication process and run any |
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command as the root user on the target server. |
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|
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Workaround |
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========== |
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|
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Do not enable "full PAM conversations" in the Authentication options of |
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Webmin and Usermin. |
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Resolution |
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========== |
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All Webmin users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-admin/webmin-1.230" |
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|
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All Usermin users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-admin/usermin-1.160" |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2005-3042 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3042 |
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[ 2 ] Original Advisory |
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http://www.lac.co.jp/business/sns/intelligence/SNSadvisory_e/83_e.html |
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|
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Availability |
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============ |
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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-200509-17.xml |
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|
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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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|
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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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|
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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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|
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http://creativecommons.org/licenses/by-sa/2.0 |
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