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Gentoo Linux Security Advisory GLSA 200510-22 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: SELinux PAM: Local password guessing attack |
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Date: October 28, 2005 |
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Bugs: #109485 |
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ID: 200510-22 |
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Synopsis |
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======== |
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|
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A vulnerability in the SELinux version of PAM allows a local attacker |
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to brute-force system passwords. |
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Background |
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========== |
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|
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PAM (Pluggable Authentication Modules) is an architecture allowing the |
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separation of the development of privilege granting software from the |
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development of secure and appropriate authentication schemes. SELinux |
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is an operating system based on Linux which includes Mandatory Access |
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Control. |
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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 sys-libs/pam < 0.78-r3 >= 0.78-r3 |
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Description |
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=========== |
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|
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The SELinux patches for PAM introduce a vulnerability allowing a |
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password to be checked with the unix_chkpwd utility without delay or |
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logging. This vulnerability doesn't affect users who do not run |
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SELinux. |
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Impact |
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====== |
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A local attacker could exploit this vulnerability to brute-force |
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passwords and escalate privileges on an SELinux 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 SELinux PAM users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-libs/pam-0.78-r3" |
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References |
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========== |
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[ 1 ] CVE-2005-2977 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2977 |
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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-200510-22.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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