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Zero Day Initiative Advisory 11-163

Zero Day Initiative Advisory 11-163
Posted May 10, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-163 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of HP 3com/H3C Intelligent Management Center. Authentication is not required to exploit this vulnerability. The flaw exists within the tftpserver.exe component which listens by default on UDP port 69. When handling the transfer mode field this value is passed through toupper before being stored in a local buffer for string comparison. The process does not properly verify the destination buffer on the stack is sufficient size to handle the newly created string. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM user.

tags | advisory, remote, arbitrary, local, udp
advisories | CVE-2011-1851
MD5 | 62d57ebaacfc1c70e411c35eb50dea03

Zero Day Initiative Advisory 11-163

Change Mirror Download
ZDI-11-163: HP 3COM/H3C Intelligent Management Center tftpserver mode Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-163

May 10, 2011

-- CVE ID:
CVE-2011-1851

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

-- Affected Vendors:
Hewlett-Packard

-- Affected Products:
Hewlett-Packard H3C Intelligent Management Center

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10904.
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 HP 3com/H3C Intelligent Management Center.
Authentication is not required to exploit this vulnerability.

The flaw exists within the tftpserver.exe component which listens by
default on UDP port 69. When handling the transfer mode field this value
is passed through toupper before being stored in a local buffer for
string comparison. The process does not properly verify the destination
buffer on the stack is sufficient size to handle the newly created
string. A remote attacker can exploit this vulnerability to execute
arbitrary code under the context of the SYSTEM user.

-- Vendor Response:
Hewlett-Packard has issued an update to correct this vulnerability. More
details can be found at:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02822750

-- Disclosure Timeline:
2010-12-01 - Vulnerability reported to vendor
2011-05-10 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
* Luigi Auriemma

-- 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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