ZDI-10-285: Novell ZENworks Desktop Management Linux TFTPD Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-285

December 13, 2010

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
Novell

-- Affected Products:
Novell Zenworks

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TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 2132.
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-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell Zenworks Desktop Management.
Authentication is not required to exploit this vulnerability.

The flaw exists within the tftpd server component which listens by
default on UDP port 69. When handling the filename in a Read Request
(0x01) packet type the process blindly copies user supplied data into a
fixed-length buffer on the stack. A remote attacker can exploit this
vulnerability to execute arbitrary code under the context of the tftpd
server process.

-- Vendor Response:
Novell states:
Fixed in ZENworks 7 Desktop Management Support Pack 1 Interim Release 4
Hot Patch 5:
http://download.novell.com/Download?buildid=r9kcCymJ7Os

Documented in TID 7007321
http://www.novell.com/support/dynamickc.do?cmd=show&forward=nonthreadedKC&docType=kc&externalId=7007321&sliceId=1

-- Disclosure Timeline:
2010-07-20 - Vulnerability reported to vendor
2010-12-13 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Francis Provencher for Protek Researchh Lab's

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