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

Open Source CERT Security Advisory 2009.4

Open Source CERT Security Advisory 2009.4
Posted May 11, 2009
Authored by Andrea Barisani, Open Source CERT | Site ocert.org

AjaxTerm suffers from a session id collision vulnerability. Versions 0.10 and below are affected.

tags | advisory
SHA-256 | a26a4d03be722182ca819bc2bda3f25b415f54ecefc7b262acaebd030d3024e0

Open Source CERT Security Advisory 2009.4

Change Mirror Download

#2009-004 AjaxTerm session id collision

Description:

AjaxTerm, an open source web based terminal, uses a form of random session id
generation which can lead to remote session hijacking.

The ajaxterm.js script allocates session ids on the client side using the
following method:

var sid=""+Math.round(Math.random()*1000000000);

The javascript random function used in combination with round does not provide
sufficient entropy for a unique session id, as the session id is the only
unique identifier for the user session it is possible for an attacker to brute
force the space of possible id values and attach an existing connection.

This vulnerability also allows Denial Of Service attacks as it is possible to
exhaust the available session ids when performing a brute force attack and,
depending on the configured AjaxTerm child command, system resources.

Affected version:

AjaxTerm <= 0.10

Fixed version:

Unfortunately oCERT has been unable to get feedback from AjaxTerm maintainers
and the package seems unmaintained, it's therefore suggested to avoid AjaxTerm
usage on production or any environment where strong security is needed.

Credit: Initial vulnerability report provided by Michael Greb <mgreb [at]
linode [dot] com>.

CVE: N/A

Timeline:

2009-03-12: vulnerability report received
2009-03-12: contacted AjaxTerm maintainer
2009-04-18: oCERT contacts various vendors security team seeking for
developers familiar with AjaxTerm
2009-04-28: due to lack of feedback oCERT asks reporter to disclose the
issue
2009-04-29: reporter agrees to disclosure
2009-05-11: advisory release

References:

Permalink:
http://www.ocert.org/advisories/ocert-2009-004.html

--
Andrea Barisani | Founder & Project Coordinator
oCERT | Open Source Computer Emergency Response Team

<lcars@ocert.org> http://www.ocert.org
0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
"Pluralitas non est ponenda sine necessitate"
Login or Register to add favorites

File Archive:

May 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    44 Files
  • 2
    May 2nd
    5 Files
  • 3
    May 3rd
    11 Files
  • 4
    May 4th
    0 Files
  • 5
    May 5th
    0 Files
  • 6
    May 6th
    28 Files
  • 7
    May 7th
    3 Files
  • 8
    May 8th
    4 Files
  • 9
    May 9th
    54 Files
  • 10
    May 10th
    12 Files
  • 11
    May 11th
    0 Files
  • 12
    May 12th
    0 Files
  • 13
    May 13th
    17 Files
  • 14
    May 14th
    11 Files
  • 15
    May 15th
    17 Files
  • 16
    May 16th
    13 Files
  • 17
    May 17th
    22 Files
  • 18
    May 18th
    0 Files
  • 19
    May 19th
    0 Files
  • 20
    May 20th
    0 Files
  • 21
    May 21st
    0 Files
  • 22
    May 22nd
    0 Files
  • 23
    May 23rd
    0 Files
  • 24
    May 24th
    0 Files
  • 25
    May 25th
    0 Files
  • 26
    May 26th
    0 Files
  • 27
    May 27th
    0 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close