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[ GLSA 200410-24 ] MIT krb5: Insecure temporary file use in send-pr.sh
From: Thierry Carrez <koon () gentoo org>
Date: Mon, 25 Oct 2004 15:09:14 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 () gentoo org 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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- [ GLSA 200410-24 ] MIT krb5: Insecure temporary file use in send-pr.sh Thierry Carrez (Oct 26)