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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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TITLE:
chetcpasswd IP Address Check Bypass and Account Enumeration

SECUNIA ADVISORY ID:
SA22967

VERIFY ADVISORY:
http://secunia.com/advisories/22967/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Exposure of system information

WHERE:
>From remote

SOFTWARE:
chetcpasswd 2.x
http://secunia.com/product/12682/

DESCRIPTION:
Bas Zoetekouw has discovered a vulnerability and a weakness in
chetcpasswd, which can be exploited by malicious people to bypass
security restrictions and identify valid user accounts.

1) Input passed in the "X-Forwarded-For" HTTP header is trusted from
all clients. This can be exploited to bypass IP address checks by
connecting to chetcpasswd and passing arbitrary values in the
header.

2) Different error messages are returned depending on whether an
unsuccessful password change attempt is performed with a valid or
invalid username.

It has also been reported that the product does not introduce delays
after failed password change attempts, making dictionary attacks
easier to perform.

The vulnerability and weakness are confirmed in version 2.3.3. Other
versions may also be affected.

SOLUTION:
Restrict access to chetcpasswd (e.g. with ".htaccess").

PROVIDED AND/OR DISCOVERED BY:
Bas Zoetekouw

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=394454

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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