__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN storebackup -- several vulnerabilities [DSA-1022-1] April 4, 2006 22:00 GMT Number Q-163 ______________________________________________________________________________ PROBLEM: Several vulnerabilities have been discovered in the backup utility storebackup. PLATFORM: Debian GNU/Linux 3.1 sarge, 1.18.4-2sarge1 and version 1.19-2 DAMAGE: Storebackup creates a temporary file predictably, which can be exploited to overwrite arbitrary files on the system with a symlink attack. The backup root directory is created with world-readable permissions, which may leak sensitive data. The user and group rights of symlinks are set incorrectly when making or restoring a backup, which may leak sensitive data. SOLUTION: Upgrade storebackup package. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM - Storebackup creates a temporary file ASSESSMENT: predictably, which can be exploited to overwrite arbitrary files on the system with a symlink attack. The backup root directory is created with world-readable permissions, which may leak sensitive data. The user and group rights of symlinks are set incorrectly when making or restoring a backup, which may leak sensitive data. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-163shtml ORIGINAL BULLETIN: http://www.debian.org/security/2006/dsa-1017 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2005-3146, CVE-2005-3147, CVE-2005-3148 ______________________________________________________________________________ [***** Start DSA-1022-1 *****] DSA-1022-1 storebackup -- several vulnerabilities Date Reported: 04 Apr 2006 Affected Packages: storebackup Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 332434. In Mitre's CVE dictionary: CVE-2005-3146, CVE-2005-3147, CVE-2005-3148. More information: Several vulnerabilities have been discovered in the backup utility storebackup. The Common Vulnerabilities and Exposures project identifies the following problems: * CVE-2005-3146 Storebackup creates a temporary file predictably, which can be exploited to overwrite arbitrary files on the system with a symlink attack. * CVE-2005-3147 The backup root directory is created with world-readable permissions, which may leak sensitive data. * CVE-2005-3148 The user and group rights of symlinks are set incorrectly when making or restoring a backup, which may leak sensitive data. The old stable distribution (woody) doesn't contain storebackup packages. For the stable distribution (sarge) these problems have been fixed in version 1.18.4-2sarge1. For the unstable distribution (sid) these problems have been fixed in version 1.19-2. We recommend that you upgrade your storebackup package. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/s/storebackup/storebackup_1.18.4-2sarge1.dsc http://security.debian.org/pool/updates/main/s/storebackup/storebackup_1.18.4-2sarge1.diff.gz http://security.debian.org/pool/updates/main/s/storebackup/storebackup_1.18.4.orig.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/s/storebackup/storebackup_1.18.4-2sarge1_all.deb MD5 checksums of the listed files are available in the original advisory. [***** End DSA-1022-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian Security Advisory 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. 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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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