what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

Splunk 4.3.x Denial Of Service

Splunk 4.3.x Denial Of Service
Posted Nov 2, 2012
Authored by Alexander Klink | Site nruns.com

Splunk version 4.3.x suffers from a denial of service hash table vulnerability.

tags | advisory, denial of service
advisories | CVE-2012-1150
SHA-256 | d5cbcf654bede60e73b046c746c6d6c0a805b9e9a6f72f4af8548cd3f36fa296

Splunk 4.3.x Denial Of Service

Change Mirror Download
n.runs AG
http://www.nruns.com/ security(at)nruns.com
n.runs-SA-2012.003 02-Nov-2012
________________________________________________________________________
Vendors: Splunk Inc., http://www.splunk.com
Product: Splunk 4.3.x (+ possibly earlier versions)
Vulnerability: Unauth. remote denial of service against splunkweb
Tracking IDs: CVE-2012-1150
SPL-53249
___________________________________________________________________________
Vendor communication:
2012/09/03 Reported the issue via Splunk's website
2012/09/04 Splunk responds and assigns tracking ID, plans fix for 5.0.
Replacing the Python version in a maintenance release
(4.3.x)
was considered too risky.
2012/10/25 Splunk informs us that 5.0 will be available on November 1st.
2012/10/29 Splunk 5.0 is released.
___________________________________________________________________________
Overview:

Splunkweb uses Python 2.7.2, which suffers from a vulnerability which allows
an
attacker to produce hash collisions for the hash table string hashing
function.
This leads to an O(n^2) complexity when inserting n keys (see
http://bugs.python.org/issue13703).

Description:

An attacker can abuse this vulnerability by sending a POST request to
Splunkweb
(for example to the login form endpoint) with colliding keys. Even a
moderate
amount of POST data leads to a 100% CPU usage for the splunkweb process.

Impact:

Denial of service (CPU exhaustion) against the Splunk server.

Fixes:

This issue has been fixed in Splunk 5.0 by updating the Python version
to 2.7.3 and enabling hash randomization.

________________________________________________________________________
Credits:
Alexander Klink, n.runs AG (discovery)
________________________________________________________________________
References:
This advisory and upcoming advisories:
http://www.nruns.com/security_advisory.php
________________________________________________________________________
About n.runs:
n.runs AG is a vendor-independent consulting company specialising in the
areas of: IT Infrastructure, IT Security and IT Business Consulting.

Copyright Notice:
Unaltered electronic reproduction of this advisory is permitted. For all
other reproduction or publication, in printing or otherwise, contact
security@nruns.com for permission. Use of the advisory constitutes
acceptance for use in an “as is” condition. All warranties are excluded.
In no event shall n.runs be liable for any damages whatsoever including
direct, indirect, incidental, consequential, loss of business profits or
special damages, even if n.runs has been advised of the possibility of such
damages.
Copyright 2012 n.runs AG. All rights reserved. Terms of use apply.


Login or Register to add favorites

File Archive:

September 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Sep 1st
    23 Files
  • 2
    Sep 2nd
    12 Files
  • 3
    Sep 3rd
    0 Files
  • 4
    Sep 4th
    0 Files
  • 5
    Sep 5th
    10 Files
  • 6
    Sep 6th
    8 Files
  • 7
    Sep 7th
    30 Files
  • 8
    Sep 8th
    14 Files
  • 9
    Sep 9th
    26 Files
  • 10
    Sep 10th
    0 Files
  • 11
    Sep 11th
    0 Files
  • 12
    Sep 12th
    5 Files
  • 13
    Sep 13th
    28 Files
  • 14
    Sep 14th
    15 Files
  • 15
    Sep 15th
    17 Files
  • 16
    Sep 16th
    9 Files
  • 17
    Sep 17th
    0 Files
  • 18
    Sep 18th
    0 Files
  • 19
    Sep 19th
    12 Files
  • 20
    Sep 20th
    15 Files
  • 21
    Sep 21st
    20 Files
  • 22
    Sep 22nd
    13 Files
  • 23
    Sep 23rd
    12 Files
  • 24
    Sep 24th
    0 Files
  • 25
    Sep 25th
    0 Files
  • 26
    Sep 26th
    30 Files
  • 27
    Sep 27th
    27 Files
  • 28
    Sep 28th
    8 Files
  • 29
    Sep 29th
    14 Files
  • 30
    Sep 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close