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2003: 2,700 advisories published
2004: 3,100 advisories published
2005: 4,600 advisories published
2006: 5,300 advisories published

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TITLE:
Meridian Prolog Manager Password Brute Force Weakness

SECUNIA ADVISORY ID:
SA28065

VERIFY ADVISORY:
http://secunia.com/advisories/28065/

CRITICAL:
Less critical

IMPACT:
Brute force, Exposure of sensitive information

WHERE:
>From local network

SOFTWARE:
Meridian Prolog Manager 2007
http://secunia.com/product/16981/
Meridian Prolog Manager 7.x
http://secunia.com/product/16980/

DESCRIPTION:
A weakness has been reported in Meridian Prolog Manager, which can be
exploited by malicious people to brute force user passwords.

The weakness is caused due to the server transmitting an encrypted
dataset of all usernames and passwords to a client during login,
using a weak encryption. This can be exploited to disclose usernames
and passwords on the network via brute force attacks.

The complexity of the brute force attacks reportedly depends on which
encryption setting was chosen ("No Encryption", "Standard Encryption",
"Enhanced Encryption").

The weakness is reported in Prolog Manager versions 2007 and 7.5.
Other versions may also be affected.

SOLUTION:
Use in a trusted network environment only and use the "Enhanced
Encryption" option.

PROVIDED AND/OR DISCOVERED BY:
An anonymous person ("Prolog Error").

ORIGINAL ADVISORY:
http://archives.neohapsis.com/archives/bugtraq/2007-12/0150.html

OTHER REFERENCES:
US-CERT VU#120593:
http://www.kb.cert.org/vuls/id/120593

http://www.kb.cert.org/vuls/id/MIMG-77FL3T

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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.

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