[SA18342] MegaBBS "replyid" Disclosure of Private Messages

TITLE:
MegaBBS "replyid" Disclosure of Private Messages

SECUNIA ADVISORY ID:
SA18342

VERIFY ADVISORY:
http://secunia.com/advisories/18342/

CRITICAL:
Moderately critical

IMPACT:
Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
MegaBBS 2.x
http://secunia.com/product/3945/

DESCRIPTION:
Hamid Ebadi has reported a vulnerability in MegaBBS, which
potentially can be exploited by malicious people to disclose
sensitive information.

The problem is that it is possible to read other users' private
messages by manipulating the "replyid" parameter.

Example:
http://[host]/send-private-message.asp?action=quote&toid=1&replyid=[id]

The vulnerability has been reported in version 2.1 and prior.

SOLUTION:
Apply patch:
http://www.pd9soft.com/megabbs/forums/get-attachment.asp?attachmentid=1758

The vulnerability has been fixed in an updated 2.1 version.

PROVIDED AND/OR DISCOVERED BY:
Hamid Ebadi, Hamid Network Security Team

ORIGINAL ADVISORY:
http://www.hamid.ir/security/megabbs.txt

---

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.