Advisory Details

October 18th, 2010

IBM Informix Dynamic Server librpc.dll Integer Overflow Remote Code Execution Vulnerability

CVE ID
CVSS SCORE	10.0, AV:N/AC:L/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	IBM
AFFECTED PRODUCTS	Informix
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['5373']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows attackers to execute arbitrary code on vulnerable installations of IBM Informix Dynamic Server. Authentication is not required to exploit this vulnerability. The specific flaw exists within the RPC protocol parsing library, librpc.dll, utilized by the ISM Portmapper service (portmap.exe) bound by default to TCP port 36890. A lack of sanity checking on supplied parameter sizes can result in an integer overflow and subsequent heap buffer under allocation which can finally lead to an exploitable memory corruption.
ADDITIONAL DETAILS	this issue was fixed in ISM 2.20.TC1.117 Integrated into the following versions by defect# idsdb00146931 - 7.31.xD11 idsdb00146930 - 9.40.xC10 idsdb00146929 - 10.00.xC8 idsdb00138308 - 11.10.xC2 This was fixed before 11.50 went GA; the fix is also in 11.50.
DISCLOSURE TIMELINE	2007-05-22 - Vulnerability reported to vendor 2010-10-18 - Coordinated public release of advisory
CREDIT	Sebastian Apelt (sebastian.apelt@siberas.de)

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