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Gentoo Linux Security Advisory GLSA 200903-39 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: pam_krb5: Privilege escalation |
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Date: March 25, 2009 |
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Bugs: #257075 |
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ID: 200903-39 |
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Synopsis |
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======== |
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|
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Two vulnerabilities in pam_krb5 might allow local users to elevate |
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their privileges or overwrite arbitrary files. |
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|
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Background |
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========== |
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pam_krb5 is a a Kerberos v5 PAM module. |
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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-auth/pam_krb5 < 3.12 >= 3.12 |
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Description |
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=========== |
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|
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The following vulnerabilities were discovered: |
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|
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* pam_krb5 does not properly initialize the Kerberos libraries for |
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setuid use (CVE-2009-0360). |
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|
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* Derek Chan reported that calls to pam_setcred() are not properly |
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handled when running setuid (CVE-2009-0361). |
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|
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Impact |
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====== |
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|
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A local attacker could set an environment variable to point to a |
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specially crafted Kerberos configuration file and launch a PAM-based |
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setuid application to elevate privileges, or change ownership and |
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overwrite arbitrary files. |
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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 pam_krb5 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-auth/pam_krb5-3.12" |
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References |
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========== |
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|
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[ 1 ] CVE-2009-0360 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0360 |
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[ 2 ] CVE-2009-0361 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0361 |
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|
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Availability |
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============ |
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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-200903-39.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 2009 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/2.5 |
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