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Gentoo Linux Security Advisory GLSA 200411-09 |
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http://security.gentoo.org/ |
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Severity: Low |
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Title: shadow: Unauthorized modification of account information |
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Date: November 04, 2004 |
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Bugs: #69212 |
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ID: 200411-09 |
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Synopsis |
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======== |
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|
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A flaw in the chfn and chsh utilities might allow modification of |
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account properties by unauthorized users. |
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Background |
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========== |
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shadow provides a set of utilities to deal with user accounts. |
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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 < 4.0.5-r1 >= 4.0.5-r1 |
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Description |
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=========== |
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|
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Martin Schulze reported a flaw in the passwd_check() function in |
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"libmisc/pwdcheck.c" which is used by chfn and chsh. |
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Impact |
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====== |
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|
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A local attacker may be able to use chfn and chsh to change the |
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standard shell of other users or modify their GECOS information (full |
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name, phone number...). |
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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-4.0.5-r1" |
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References |
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========== |
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[ 1 ] shadow NEWS file |
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http://ftp.pld.org.pl/software/shadow/NEWS |
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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-200411-09.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 2004 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/1.0 |
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