Oracle Outside In Excel MergeCells Record Parsing Remote Code Execution Vulnerability

August 22nd, 2012
ZDI-12-152 ZDI-CAN-1483

CVE ID

CVSS Score

10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors

Oracle

Affected Products

Outside In

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of applications that utilize Oracle's Outside In Technology. User interaction is required to exploit this vulnerability in that the target must visit open a malicious file.

The specific flaw exists within the parsing of Excel files. When handling the MergeCells record, the process does not properly validate size values which can lead to an integer overflow. The resulting value is used to allocate a heap buffer which can be corrupted by an attacker to execute arbitrary code under the context of the application.

Additional Details

Oracle has issued an update to correct this vulnerability. More details can be found at:
http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html

Disclosure Timeline

  • 2011-12-19 - Vulnerability reported to vendor
  • 2012-08-22 - Coordinated public release of advisory

Credit

gwslabs.com

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