Advisory Details

October 18th, 2010

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

ZDI-10-215
ZDI-CAN-200

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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