Ubuntu
fail2ban package

  1. Bug #121374
  2. Comment #10

Comment 10 for bug 121374

Revision history for this message
Yaroslav Halchenko (yarikoptic) wrote : Re: [Bug 121374] Re: Denial of service through log injection in fail2ban

and actually since .* is greedy, vulnerability is not there actually...
could you test on example?

On Wed, 12 Dec 2007, Chris Fryer wrote:

> This is the relevant line from /etc/fail2ban.conf when fail2ban 0.6.0-3
> is installed on Ubuntu 6.06 LTS (Dapper).

> failregex = : (?:(?:Authentication failure|Failed [-/\w+]+) for(?:
> [iI](?:llegal|nvalid) user)?|[Ii](?:llegal|nvalid) user) .* from
> (?:::f{4,6}:)?(?P<host>\S*)

> This seems to allow any non-whitespace characters after <host>, which I
> believe is the nature of the vulnerability described in CVE-2006-6302.
> Please correct me if I'm wrong.
--
Yaroslav Halchenko
Research Assistant, Psychology Department, Rutgers-Newark
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