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TITLE:
Yosemite Backup "DtbClsLogin()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA32262

VERIFY ADVISORY:
http://secunia.com/advisories/32262/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From local network

SOFTWARE:
Yosemite Backup 8.x
http://secunia.com/advisories/product/20170/

DESCRIPTION:
Abdul-Aziz Hariri has discovered a vulnerability in Yosemite Backup,
which can be exploited by malicious people to cause a DoS (Denial of
Service) and compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"DtbClsLogin()" function in ytwindtb.dll (Windows) or libytlindtb.so
(Linux), which can be exploited to cause a stack-based buffer
overflow by sending specially crafted requests to the application.

Successful exploitation allows to crash the application on a Windows
system and execute arbitrary code on a Linux system.

The vulnerability is confirmed in Yosemite Backup 8.70 (41769) Trial
version.

SOLUTION:
Restrict network access to the application.

PROVIDED AND/OR DISCOVERED BY:
Abdul-Aziz Hariri

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