[LACNIC/Seguridad] Fragmentacion IPv6 bis (Fwd: RE: [Full-disclosure] Remote system freeze thanks to Kaspersky Internet Security 2013 (SA52053))

Fernando Gont fernando en gont.com.ar
Mar Mar 5 19:44:22 BRT 2013


Alguien de no muy buena reputación ;-) una vez dijo esta máxima "You can
get more things with a kind word and a gun, than with a kind word
alone". :-)

-------- Original Message --------
From: Vulnerability Mailbox <Vulnerability en kaspersky.com>
To: Marc Heuse (mh en mh-sec.de) <mh en mh-sec.de>,  bugtraq en securityfocus.com
<bugtraq en securityfocus.com>,  vuln en secunia.com <vuln en secunia.com>
CC: noloader en gmail.com <noloader en gmail.com>,  Full Disclosure
<full-disclosure en lists.grok.org.uk>,  IPv6 Hackers Mailing List
<ipv6hackers en lists.si6networks.com>,  Vulnerability Mailbox
<Vulnerability en kaspersky.com>
Subject: RE: [Full-disclosure] Remote system freeze thanks to Kaspersky
Date: Tue, 5 Mar 2013 13:04:33 +0000
Message-ID: <F7B4DB06AE107245994FAF8527EAB9331DF2B79B en HQMailDAG1.avp.ru>

Hello, Marc, colleagues,
We confirm bug that could result in system freeze existed in kneps
system  driver. Private fix is available right now, patch via automatic
product update pending release.

Best regards,

Vulnerability response | Kaspersky Lab
tel: +7 495 7978700 | Vulnerability en kaspersky.com
Olimpia Park, bld.3, 39A, Lengradskoe sh., Moscow, Russia, 125212 |
www.kaspersky.com,  www.securelist.com

-----Original Message-----
From: Jeffrey Walton [mailto:noloader en gmail.com]
Sent: Monday, March 04, 2013 10:04 AM
To: Vulnerability Mailbox; Vulnerability Mailbox
Subject: Fwd: [Full-disclosure] Remote system freeze thanks to Kaspersky
Internet Security 2013

---------- Forwarded message ----------
From: Marc Heuse < >
Date: Mon, Mar 4, 2013 at 1:01 AM
Subject: [Full-disclosure] Remote system freeze thanks to Kaspersky
Internet Security 2013
To: "bugtraq en securityfocus.com" < >, Full Disclosure
<full-disclosure en lists.grok.org.uk>, IPv6 Hackers Mailing List
<ipv6hackers en lists.si6networks.com>

I usually do not write security advisories unless absolutely necessary.

This time I should, however I have neither the time, nor the desire to
do so.
But Kaspersky did not react, so ... quick and dirty:

Kaspersky Internet Security 2013 (and any other Kaspersky product which
includes the firewall funcionality) is susceptible to a remote system
As of the 3rd March 2013, the bug is still unfixed.

If IPv6 connectivity to a victim is possible (which is always the case
on local networks), a fragmented packet with multiple but one large
extension header leads to a complete freeze of the operating system.
No log message or warning window is generated, nor is the system able to
perform any task.

To test:
  1. download the thc-ipv6 IPv6 protocol attack suite for Linux from
  2. compile the tools with "make"
  3. run the following tool on the target:
        firewall6 <interface> <target> <port> 19
     where interface is the network interface (e.g. eth0)
           target is the IPv6 address of the victim (e.g. ff02::1)
           port is any tcp port, doesnt matter which (e.g. 80)
       and 19 is the test case number.
     The test case numbers 18, 19, 20 and 21 lead to a remote system freeze.

Solution: Remove the Kaspersky Anti-Virus NDIS 6 Filter from all network
interfaces or uninstall the Kaspersky software until a fix is provided.

The bug was reported to Kaspersky first on the 21st January 2013, then
reminded on the 14th Feburary 2013.
No feedback was given by Kaspersky, and the reminder contained a warning
that without feedback the bug would be disclosed on this day. So here we

Marc Heuse

Marc Heuse

PGP: FEDD 5B50 C087 F8DF 5CB9  876F 7FDD E533 BF4F 891A

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Fernando Gont
e-mail: fernando en gont.com.ar || fgont en si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1

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