Advisory Details

December 15th, 2013

IBM Forms Viewer 'fontname' Stack Buffer Overflow Remote Code Execution Vulnerability

ZDI-13-274
ZDI-CAN-1976

CVE ID CVE-2013-5447
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS IBM
AFFECTED PRODUCTS Forms Viewer
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of IBM Forms Viewer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within a document handler of an XFDL document. The parsing of the 'fontname' tag with a large value can lead to a stack buffer overflow. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the process.

VENDOR RESPONSE IBM has issued an update to correct this vulnerability. More details can be found at:
http://www-01.ibm.com/support/docview.wss?uid=swg21657500
DISCLOSURE TIMELINE
  • 2013-09-27 - Vulnerability reported to vendor
  • 2013-12-15 - Coordinated public release of advisory
CREDIT Andrea Micalizzi aka rgod
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