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Zero Day Initiative Advisory 10-285

Zero Day Initiative Advisory 10-285
Posted Dec 14, 2010
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 10-285 - 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.

tags | advisory, remote, arbitrary, udp
SHA-256 | 82ccd040dbaba20699b014b47ff6ef8abe2763e1feeb146935df2c95f013eff2

Zero Day Initiative Advisory 10-285

Change Mirror Download
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

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 2132.
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com

-- 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

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi


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