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Zero Day Initiative Advisory 12-196

Zero Day Initiative Advisory 12-196
Posted Dec 22, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-196 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell Groupwise. Authentication is not required to exploit this vulnerability. The flaw exists within the Groupwise Internet Agent component, specifically the optional LDAP server which listens on tcp port 389. When parsing a BER encoded parameter the specified size is used to allocate a destination buffer. A properly encoded BER chunk could cause an integer size value to wrap before buffer allocation. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM account.

tags | advisory, remote, arbitrary, tcp
advisories | CVE-2012-0417
MD5 | 5fdf72274f2cf8636c74ad0a7b3bcff1

Zero Day Initiative Advisory 12-196

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ZDI-12-196 : Novell Groupwise GWIA ber_get_stringa Remote Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-196
December 21, 2012

- -- CVE ID:
CVE-2012-0417

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

- -- Affected Vendors:
Novell

- -- Affected Products:
Novell Groupwise


- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12495.
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 Groupwise. Authentication is not
required to exploit this vulnerability.

The flaw exists within the Groupwise Internet Agent component, specifically
the optional LDAP server which listens on tcp port 389. When parsing a BER
encoded parameter the specified size is used to allocate a destination
buffer. A properly encoded BER chunk could cause an integer size value to
wrap before buffer allocation. A remote attacker can exploit this
vulnerability to execute arbitrary code under the context of the SYSTEM
account.

- -- Vendor Response:

Novell has issued an update to correct this vulnerability. More details can
be found at:
http://www.novell.com/support/kb/doc.php?id=7010770


- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor
2012-12-21 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:
* Francis Provencher From Protek Research 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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