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TITLE:
Novell GroupWise WebAccess Base64 Decoding Buffer Overflow

SECUNIA ADVISORY ID:
SA24944

VERIFY ADVISORY:
http://secunia.com/advisories/24944/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Novell GroupWise 7.x
http://secunia.com/product/5667/

DESCRIPTION:
A vulnerability has been reported in Novell GroupWise, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error within the handling of
base64 data supplied via HTTP authentication requests. This can be
exploited to cause a stack based buffer overflow via a specially
crafted request containing overly large data (at least 336 bytes).

Successful exploitation may allow execution of arbitrary code.

SOLUTION:
Update to version 7.0 SP2.

GroupWise 7 SP2 Win/NLM Full US and MULTI 7.0.2:
http://download.novell.com/Download?buildid=8RF83go0nZg~

GroupWise 7 SP2 Linux US and MULTI 7.0.2:
http://download.novell.com/Download?buildid=O9ucpbS1bK0~

PROVIDED AND/OR DISCOVERED BY:
Tenable Network Security, reported via ZDI

ORIGINAL ADVISORY:
http://www.zerodayinitiative.com/advisories/ZDI-07-015.html

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