USN-3506-1: rsync vulnerabilities

Ubuntu Security Notice USN-3506-1

7th December, 2017

rsync vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Several security issues were fixed in rsync.

Software description

  • rsync - fast, versatile, remote (and local) file-copying tool


It was discovered that rsync proceeds with certain file metadata updates
before checking for a filename. An attacker could use this to bypass access
restrictions. (CVE-2017-17433)

It was discovered that rsync does not check for fnamecmp filenames and also
does not apply the sanitize_paths protection mechanism to pathnames. An attacker
could use this to bypass access restrictions. (CVE-2017-17434)

Update instructions

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

Ubuntu 17.10:
rsync 3.1.2-2ubuntu0.1
Ubuntu 17.04:
rsync 3.1.2-1ubuntu0.1
Ubuntu 16.04 LTS:
rsync 3.1.1-3ubuntu1.1
Ubuntu 14.04 LTS:
rsync 3.1.0-2ubuntu0.3

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.


CVE-2017-17433, CVE-2017-17434