ESB-2017.3135 - [Ubuntu] rsync: Unauthorised access - Remote/unauthenticated 2017-12-08

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.3135
                           rsync vulnerabilities
                              8 December 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           rsync
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17434 CVE-2017-17433 

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3506-1
   http://www.ubuntu.com/usn/usn-3506-2

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running rsync check for an updated version of the software for their
         operating system.
         
         This bulletin contains two (2) Ubuntu security advisories.

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3506-1
December 07, 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

Summary:

Several security issues were fixed in rsync.

Software Description:
- - rsync: fast, versatile, remote (and local) file-copying tool

Details:

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 versions:

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

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

References:
  https://www.ubuntu.com/usn/usn-3506-1
  CVE-2017-17433, CVE-2017-17434

Package Information:
  https://launchpad.net/ubuntu/+source/rsync/3.1.2-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/rsync/3.1.2-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/rsync/3.1.1-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/rsync/3.1.0-2ubuntu0.3

- ----------------------------------------------------------------------

==========================================================================
Ubuntu Security Notice USN-3506-2
December 07, 2017

rsync vulnerabilities
==========================================================================

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

- - Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in rsync.

Software Description:
- - rsync: fast, versatile, remote (and local) file-copying tool

Details:

USN-3506-1 fixed two vulnerabilities in rsync. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 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 versions:

Ubuntu 12.04 ESM:
  rsync                           3.0.9-1ubuntu1.2

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

References:
  https://www.ubuntu.com/usn/usn-3506-2
  https://www.ubuntu.com/usn/usn-3506-1
  CVE-2017-17433, CVE-2017-17434

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQIVAwUBWinOd4x+lLeg9Ub1AQg6lg//X51L0Il0W3UYon4a8d1eWM8S/JGtpcB1
2Y1ZcOAxLzR319U8H2ikvPzYbmlsCHiVpFOk3PZIXAGZa2yD8U+QinoeaMVzbJu6
TZasVlVQILlvBpHKWXHO+IcU6kgUvqtZUA85kxMamfzPer58xFjs37iGGLWuACEv
r7wDwQ8PZUEIFYgJLwqz1dmJ9FseCftP6YMALGdI5fVZ+NCGKbTs0OSHBF+pmWll
5BUvzupWYvPZUQgPDstKunvva7V+SiSpE++f+Zd5Cs68uKQxiwjZmPwZ6yw8avIb
ygVsIH29oaoiclATp7+AWS1PhTDzwLCTz5VUJHLnm+aMZBju6fRqcvqHIS3mS72r
wH9zIZjmu/ruCtYLO5CU/fN4KT2Q9sI2EU1ZRF5dAaxi7QZxXHLdZ1SLu/sgLTcH
VSNyXGDSrP8jQvjC44WqpxxUpoCqbxqKyTFXrKrbEhSnHLaOiDh1eZpAx5YrfSvo
1DtIH84ZYM8oFvbIYgWAvnVZ3A07uv2NpTTjZCOOJIVj1+2BmSgkbmIHglJf9QEk
pOlQSXRquN1TE0d6z6SxkurbIHGM6uvCMICaAsNsNwJAeedP4EpWNRSEHA2YX+3v
X1eoD4OA0JE1K/5tSWVKdZh8er2MYNAPmT+3pe7749GLeF/v4Ys3VhamvAh4pPAa
D9sN1foiN8Y=
=8+Xp
-----END PGP SIGNATURE-----

« Back to bulletins