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Gentoo Linux Security Advisory GLSA 200909-01 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Linux-PAM: Privilege escalation |
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Date: September 07, 2009 |
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Bugs: #261512 |
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ID: 200909-01 |
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Synopsis |
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======== |
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|
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An error in the handling of user names of Linux-PAM might allow remote |
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attackers to cause a Denial of Service or escalate privileges. |
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Background |
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========== |
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|
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Linux-PAM (Pluggable Authentication Modules) is an architecture |
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allowing the separation of the development of privilege granting |
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software from the development of secure and appropriate authentication |
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schemes. |
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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 < 1.0.4 >= 1.0.4 |
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|
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Description |
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=========== |
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|
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Marcus Granado repoted that Linux-PAM does not properly handle user |
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names that contain Unicode characters. This is related to integer |
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signedness errors in the pam_StrTok() function in libpam/pam_misc.c. |
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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 exploit this vulnerability to cause a Denial of |
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Service. A remote authenticated attacker could exploit this |
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vulnerability to log in to a system with the account of a user that has |
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a similar user name, but with non-ASCII characters. |
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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 Linux-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-1.0.4 |
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References |
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========== |
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[ 1 ] CVE-2009-0887 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0887 |
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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-200909-01.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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https://bugs.gentoo.org. |
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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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http://creativecommons.org/licenses/by-sa/2.5 |
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