TITLE:
Mailman Cross-Site Scripting and Weak Password Generation

SECUNIA ADVISORY ID:
SA13603

VERIFY ADVISORY:
http://secunia.com/advisories/13603/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting, Brute force

WHERE:
>From remote

SOFTWARE:
Mailman 2.x
http://secunia.com/product/1010/

DESCRIPTION:
A vulnerability and a weakness have been reported in Mailman, which
can be exploited by malicious people to conduct cross-site scripting
attacks and potentially brute force a user's password.

1) Input is not properly sanitised by "scripts/driver" when returning
error pages. This can be exploited to execute arbitrary HTML or script
code in a user's browser session in context of a vulnerable site by
tricking a user into visiting a malicious web site or follow a
specially crafted link.

2) A weakness in the algorithm of the automatic password generation
causes only about five million different passwords to be generated.
This makes it easier to brute force automatically generated
passwords.

SOLUTION:
1) Filter malicious characters and character sequences in a proxy or
firewall with URL filtering capabilities.
2) Choose a strong password for subscriptions, instead of letting
Mailman generate one.

PROVIDED AND/OR DISCOVERED BY:
1) Florian Weimer
2) ZENDAS

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About:
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