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Gentoo Linux Security Advisory GLSA 200903-24 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Shadow: Privilege escalation |
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Date: March 10, 2009 |
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Bugs: #251320 |
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ID: 200903-24 |
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Synopsis |
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======== |
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|
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An insecure temporary file usage in Shadow may allow local users to |
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gain root privileges. |
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Background |
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========== |
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|
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Shadow is a set of tools to deal with user accounts. |
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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-apps/shadow < 4.1.2.2 >= 4.1.2.2 |
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Description |
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=========== |
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|
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Paul Szabo reported a race condition in the "login" executable when |
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setting up tty permissions. |
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Impact |
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====== |
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|
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A local attacker belonging to the "utmp" group could use symlink |
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attacks to overwrite arbitrary files and possibly gain root privileges. |
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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 Shadow users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.1.2.2" |
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|
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References |
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========== |
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[ 1 ] CVE-2008-5394 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5394 |
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|
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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-200903-24.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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|
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License |
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======= |
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Copyright 2009 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/2.5 |
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