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Zero Day Initiative Advisory 11-156

Zero Day Initiative Advisory 11-156
Posted May 10, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-156 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Sybase M-Business Anywhere. Authentication is not required to exploit this vulnerability. The specific flaw exists within agsync.dll, which listens for SOAP and sync (HTTP) requests on ports 80 and 443 (HTTPS). When handling a supplied username parameter the process fails to verify the string length. This user-supplied data is then copied to a static sized buffer on the heap. A remote attacker could use this flaw to inject arbitrary code into the agd.exe process, which runs by default under the SYSTEM context.

tags | advisory, remote, web, arbitrary
SHA-256 | b53828c6edcdfd2192b06d6d280ef057b3483af55ad1c2aa33de7d13444ce4fe

Zero Day Initiative Advisory 11-156

Change Mirror Download
ZDI-11-156: Sybase M-Business Anywhere agd.exe username Parameter Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-156

May 9, 2011

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

-- Affected Vendors:
Sybase

-- Affected Products:
Sybase MBusiness Anywhere

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11139.
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 Sybase M-Business Anywhere. Authentication
is not required to exploit this vulnerability.

The specific flaw exists within agsync.dll, which listens for SOAP and
sync (HTTP) requests on ports 80 and 443 (HTTPS). When handling a
supplied username parameter the process fails to verify the string
length. This user-supplied data is then copied to a static sized buffer
on the heap. A remote attacker could use this flaw to inject arbitrary
code into the agd.exe process, which runs by default under the SYSTEM
context.

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

http://www.sybase.com/detail?id=1093029

-- Disclosure Timeline:
2011-04-01 - Vulnerability reported to vendor
2011-05-09 - 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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