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Gentoo Linux Security Advisory GLSA 200612-19 |
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http://security.gentoo.org/ |
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Severity: Low |
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Title: pam_ldap: Authentication bypass vulnerability |
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Date: December 20, 2006 |
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Bugs: #153916 |
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ID: 200612-19 |
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Synopsis |
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======== |
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|
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pam_ldap contains a vulnerability that may allow a remote user with a |
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locked account to gain unauthorized system access. |
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Background |
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========== |
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pam_ldap is a Pluggable Authentication Module which allows |
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authentication against LDAP directories. |
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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 sys-auth/pam_ldap < 183 >= 183 |
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Description |
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=========== |
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|
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Steve Rigler discovered that pam_ldap does not correctly handle |
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"PasswordPolicyResponse" control responses from an LDAP directory. This |
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causes the pam_authenticate() function to always succeed, even if the |
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previous authentication failed. |
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|
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Impact |
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====== |
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|
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A locked user may exploit this vulnerability to bypass the LDAP |
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authentication mechanism, possibly gaining unauthorized access to the |
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system. |
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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 pam_ldap users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-auth/pam_ldap-183" |
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References |
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========== |
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[ 1 ] CVE-2006-5170 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5170 |
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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-200612-19.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 2006 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/2.5 |
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