- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200410-24 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: MIT krb5: Insecure temporary file use in send-pr.sh Date: October 25, 2004 Bugs: #66359 ID: 200410-24 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== The send-pr.sh script, included in the mit-krb5 package, is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the utility. Background ========== MIT krb5 is the free implementation of the Kerberos network authentication protocol written by the Massachusetts Institute of Technology. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-crypt/mit-krb5 <= 1.3.5 >= 1.3.5-r1 *>= 1.3.4-r1 Description =========== The send-pr.sh script creates temporary files in world-writeable directories with predictable names. Impact ====== A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When send-pr.sh is called, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user. Workaround ========== There is no known workaround at this time. Resolution ========== All MIT krb5 users should upgrade to the latest version: # emerge sync # emerge -pv ">=app-crypt/mit-krb5-1.3.4-r1" # emerge ">=app-crypt/mit-krb5-1.3.4-r1" References ========== [ 1 ] CAN-2004-0971 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0971 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200410-24.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@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2004 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/1.0
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