drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Hash-Kollision in rdiff-backup
Name: |
Hash-Kollision in rdiff-backup |
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ID: |
FEDORA-2015-2923 |
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Distribution: |
Fedora |
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Plattformen: |
Fedora 22 |
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Datum: |
Mo, 9. März 2015, 11:20 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8242 |
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Applikationen: |
rdiff-backup |
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Originalnachricht |
Name : rdiff-backup Product : Fedora 22 Version : 1.2.8 Release : 14.fc22 URL : http://www.nongnu.org/rdiff-backup/ Summary : Convenient and transparent local/remote incremental mirror/backup Description : rdiff-backup is a script, written in Python, that backs up one directory to another and is intended to be run periodically (nightly from cron for instance). The target directory ends up a copy of the source directory, but extra reverse diffs are stored in the target directory, so you can still recover files lost some time ago. The idea is to combine the best features of a mirror and an incremental backup. rdiff-backup can also operate in a bandwidth efficient manner over a pipe, like rsync. Thus you can use rdiff-backup and ssh to securely back a hard drive up to a remote location, and only the differences from the previous backup will be transmitted.
------------------------------------------------------------------------------- - Update Information:
Changes in librsync 1.0.0 (2015-01-23)
======================================
* SECURITY: CVE-2014-8242: librsync previously used a truncated MD4 "strong" check sum to match blocks. However, MD4 is not cryptographically strong. It's possible that an attacker who can control the contents of one part of a file could use it to control other regions of the file, if it's transferred using librsync/rdiff. For example this might occur in a database, mailbox, or VM image containing some attacker-controlled data. To mitigate this issue, signatures will by default be computed with a 256-bit BLAKE2 hash. Old versions of librsync will complain about a bad magic number when given these signature files. Backward compatibility can be obtained using the new `rdiff sig --hash=md4` option or through specifying the "signature magic" in the API, but this should not be used when either the old or new file contain untrusted data. Deltas generated from those signatures will also use BLAKE2 during generation, but produce output that can be read by old versions. See https://github.com/librsync/librsync/issues/5. Thanks to Michael Samuel <miknet.net> for reporting this and offering an initial patch.
* Various build fixes, thanks Timothy Gu.
* Improved rdiff man page from Debian.
* Improved librsync.spec file for building RPMs.
* Fixed bug #1110812 'internal error: job made no progress'; on large files.
* Moved hosting to https://github.com/librsync/librsync/
* Travis-CI.org integration test at https://travis-ci.org/librsync/librsync/
* Remove bundled copy of popt; it must be installed separately.
* You can set `$LIBTOOLIZE` before running `autogen.sh`, for example on OS X Homebrew where it is called `glibtoolize`. ------------------------------------------------------------------------------- - References:
[ 1 ] Bug #1126712 - CVE-2014-8242 librsync: MD4 collision file corruption https://bugzilla.redhat.com/show_bug.cgi?id=1126712 ------------------------------------------------------------------------------- -
This update can be installed with the "yum" update program. Use su -c 'yum update rdiff-backup' at the command line. For more information, refer to "Managing Software with yum", available at http://docs.fedoraproject.org/yum/.
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 https://fedoraproject.org/keys ------------------------------------------------------------------------------- - _______________________________________________ package-announce mailing list package-announce@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/package-announce
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