Advisories ยป MGASA-2015-0146

Updated librsync packages fix security vulnerabilities

Publication date: 15 Apr 2015
Type: security
Affected Mageia releases : 4
CVE: CVE-2014-8242


Updated librsync packages fix security vulnerability:

librsync before 1.0.0 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

The change to fix this is not backward compatible with older versions of
librsync. 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.

Also, any applications that use the librsync library will need to be
recompiled against the updated library.  The duplicity and rdiff-backup
packages have been rebuilt for this reason.