Multiple Vendor librpc.dll Signedness Error Remote Code Execution VulnerabilityZDI-10-023: March 1st, 2010
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This vulnerability allows attackers to execute arbitrary code on vulnerable installations of both IBM Informix Dynamic Server and EMC Legato Networker. User interaction 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. During authentication, a lack of a proper signedness check on a supplied parameter size can result in exploitable stack based buffer overflow leading to arbitrary code execution under the context of the SYSTEM user.
Vendor ResponseIBM states:
IBM states that this issue was first fixed in: IDS 10.00.TC9, IDS 11.10.TC3 Recommended fix pack version: IDS 10.00.TC10, IDS 11.10.TC3 4. URL to APAR or fixpack Fix pack download URL: http://www-933.ibm.com/support/fixcentral/
EMC has released a Security Advisory (ESA-08-007) identifier to customers through Powerlink.
2008-02-07 - Vulnerability reported to vendor
2010-03-01 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Sebastian Apelt (firstname.lastname@example.org)