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Fedora 22: xfsprogs Update Critical: xfs_metadump Data Exposure

Gabriel Vlasiu reported that xfs_metadump, part of the xfsprogs suite of tools for the XFS filesystem, did not properly obfuscate data. xfs_metadump properly obfuscates active metadata, but the rest of the space within that fs block comes through in the clear. This could lead to exposure of stale disk data via the produced metadump image. The expectation of xfs_metadump is to obfuscate all but the [More...]. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2015-12435 2015-07-31 05:37:47 -------------------------------------------------------------------------------- Name : xfsprogs Product : Fedora 22 Version : 3.2.2 Release : 2.fc22 URL : Summary : Utilities for managing the XFS filesystem Description : A set of commands to use the XFS filesystem, including mkfs.xfs. XFS is a high performance journaling filesystem which originated on the SGI IRIX platform. It is completely multi-threaded, can support large files and large filesystems, extended attributes, variable block sizes, is extent based, and makes extensive use of Btrees (directories, extents, free space) to aid both performance and scalability. Refer to the documentation at for complete details. This implementation is on-disk compatible with the IRIX version of XFS. -------------------------------------------------------------------------------- Update Information: Gabriel Vlasiu reported that xfs_metadump, part of the xfsprogs suite of tools for the XFS filesystem, did not properly obfuscate data. xfs_metadump properly obfuscates active metadata, but the rest of the space within that fs block comes through in the clear. This could lead to exposure of stale disk data via the produced metadump image. The expectation of xfs_metadump is to obfuscate all but the shortest names in the metadata, as noted in the manpage: By default, xfs_metadump obfuscates most file (regular file, directory and symbolic link) names and extended attribute names to allow the dumps to be sent without revealing confidential information. Extended attribute values are zeroed and no data is copied. The only exceptions are file or attribute names that are 4 or less characters in length. Also file names that span extents (this can only occur with the mkfs.xfs(8) options where -n size > -b size) are not obfuscated. Names between 5 and 8 characters in length inclusively are partially obfuscated. While the xfs_metadump tool can be run by unprivileged users, it requires appropriate permissions to access block devices (such as root) where the sensitive data might be dumped. An unprivileged user, without access to the block device, could not use this flaw to obtain sensitive data they would not otherwise have permission to access. -------------------------------------------------------------------------------- ChangeLog: * Thu Jul 30 2015 Eric Sandeen 3.2.2-2 - Fix CVE-2012-2051 -------------------------------------------------------------------------------- References: [ 1 ] Bug #817696 - CVE-2012-2150 xfsprogs: xfs_metadump information disclosure flaw https://bugzilla.redhat.com/show_bug.cgi?id=817696 -------------------------------------------------------------------------------- This update can be installed with the "yum" update program. Use su -c 'yum update xfsprogs' at the command line. For more information, refer to "Managing Software with yum", available at . All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at -------------------------------------------------------------------------------- _______________________________________________ package-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. https://lists.fedoraproject.org/admin/lists/package-announce.lists.fedoraproject.org/ . XFS Metadump utility reveals outdated disk information stemming from inadequate obfuscation, urgent patch required for Fedora 22. Discover details here!.xfs_metadump,xfsprogs,data obfuscation,Fedora update,security note. . Severity: Critical. LinuxSecurity.com Team

Aug 12, 2015 •Critical Fedora