drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Zahlenüberlauf in Linux-PAM
Name: |
Zahlenüberlauf in Linux-PAM |
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ID: |
200909-01 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mo, 7. September 2009, 03:02 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0887 |
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Applikationen: |
Linux-PAM |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200909-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Linux-PAM: Privilege escalation Date: September 07, 2009 Bugs: #261512 ID: 200909-01
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Synopsis ========
An error in the handling of user names of Linux-PAM might allow remote attackers to cause a Denial of Service or escalate privileges.
Background ==========
Linux-PAM (Pluggable Authentication Modules) is an architecture allowing the separation of the development of privilege granting software from the development of secure and appropriate authentication schemes.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-libs/pam < 1.0.4 >=3D 1.0.4
Description ===========
Marcus Granado repoted that Linux-PAM does not properly handle user names that contain Unicode characters. This is related to integer signedness errors in the pam_StrTok() function in libpam/pam_misc.c.
Impact ======
A remote attacker could exploit this vulnerability to cause a Denial of Service. A remote authenticated attacker could exploit this vulnerability to log in to a system with the account of a user that has a similar user name, but with non-ASCII characters.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All Linux-PAM users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose =3Dsys-libs/pam-1.0.4
References ==========
[ 1 ] CVE-2009-0887 http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-0887
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200909-01.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License =======
Copyright 2009 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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