__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Perl [Debian Security Advisory DSA-696-1] March 22, 2005 18:00 GMT Number P-157 [REVISION 26 Jun 2005] [REVISED 05 Oct 2005] ______________________________________________________________________________ PROBLEM: The File::Path::rmtree function of perl has a race condition when deleting a directory tree. PLATFORM: Debian GNU/Linux 3.0 alias woody HP-UX B.11.00, B.11.11, B.11.23 running perl Red Hat Desktop (v. 4) Red Hat Enterprise Linux AS, ES, WS (v. 4) DAMAGE: A different user can exploit the race condition to create setuid binaries in the directory tree. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is LOW. The race condition is hard to exploit. The ASSESSMENT: other user must have write permissions to any subdirectory of the tree to exploit this vulnerability. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-157.shtml ORIGINAL BULLETIN: Debian Security Advisory DSA-696-1 http://www.debian.org/security/2005/dsa-696 ADDITIONAL LINKS: Visit Hewlett-Packard Subscription Service for: HPSBUX01208 SSRT5938 Rev.0 Red Hat Security Advisory RHSA-2005:674-10 https://rhn.redhat.com/errata/RHSA-2005-674.html CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2005-0448 ______________________________________________________________________________ REVISION HISTORY: 06/16/2005 - added a link to Hewlett-Packard HPSBUX01208 SSRT5938 for HP-UX B.11.00, B.11.11, B.11.23. 10/05/2005 - added a link to Red Hat Security Advisory RHSA-2005:674 that provides updated perl packages for Red Hat Linux 4. [***** Start Debian Security Advisory DSA-696-1 *****] Debian Security Advisory DSA-696-1 perl -- design flaw Date Reported: 22 Mar 2005 Affected Packages: perl Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 286905, Bug 286922. In Mitre's CVE dictionary: CAN-2005-0448. More information: Paul Szabo discovered another vulnerability in the File::Path::rmtree function of perl, the popular scripting language. When a process is deleting a directory tree, a different user could exploit a race condition to create setuid binaries in this directory tree, provided that he already had write permissions in any subdirectory of that tree. For the stable distribution (woody) this problem has been fixed in version 5.6.1-8.9. For the unstable distribution (sid) this problem has been fixed in version 5.8.4-8. We recommend that you upgrade your perl packages. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9.dsc http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9.diff.gz http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1.orig.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/p/perl/libcgi-fast-perl_5.6.1-8.9_all.deb http://security.debian.org/pool/updates/main/p/perl/perl-doc_5.6.1-8.9_all.deb http://security.debian.org/pool/updates/main/p/perl/perl-modules_5.6.1-8.9_all.deb Alpha: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_alpha.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_alpha.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_alpha.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_alpha.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_alpha.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_alpha.deb ARM: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_arm.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_arm.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_arm.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_arm.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_arm.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_i386.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_i386.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_i386.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_i386.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_i386.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_ia64.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_ia64.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_ia64.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_ia64.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_ia64.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_ia64.deb HPPA: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_hppa.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_hppa.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_hppa.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_hppa.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_hppa.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_m68k.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_m68k.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_m68k.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_m68k.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_m68k.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_mips.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_mips.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_mips.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_mips.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_mips.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_mipsel.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_mipsel.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_mipsel.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_mipsel.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_mipsel.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_powerpc.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_powerpc.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_powerpc.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_powerpc.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_powerpc.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_s390.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_s390.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_s390.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_s390.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_s390.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/p/perl/libperl-dev_5.6.1-8.9_sparc.deb http://security.debian.org/pool/updates/main/p/perl/libperl5.6_5.6.1-8.9_sparc.deb http://security.debian.org/pool/updates/main/p/perl/perl_5.6.1-8.9_sparc.deb http://security.debian.org/pool/updates/main/p/perl/perl-base_5.6.1-8.9_sparc.deb http://security.debian.org/pool/updates/main/p/perl/perl-debug_5.6.1-8.9_sparc.deb http://security.debian.org/pool/updates/main/p/perl/perl-suid_5.6.1-8.9_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-696-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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