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USN-500-1: rsync vulnerability

20 August 2007

rsync vulnerability



Sebastian Krahmer discovered that rsync contained an off-by-one
miscalculation when handling certain file paths. By creating a specially
crafted tree of files and tricking an rsync server into processing them,
a remote attacker could write a single NULL to stack memory, possibly
leading to arbitrary code execution.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.04
  • rsync - 2.6.9-3ubuntu1.1
Ubuntu 6.10
  • rsync - 2.6.8-2ubuntu3.1
Ubuntu 6.06
  • rsync - 2.6.6-1ubuntu2.1

In general, a standard system upgrade is sufficient to effect the
necessary changes.