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Adobe Flash Player Invalid Pointer Vulnerability

Notification Type:	IBM Internet Security Systems Protection Advisory
Notification Date:	April 08, 2008
Notification Version:	1.1

Name:	Adobe Flash Player Invalid Pointer Vulnerability
Public disclosure/ In the wild date:	April 08, 2008 (vuln disclosure), May 27, 2008 (active exploitation)
Aliases:	APSB08-11
CVE:	CVE-2007-0071
Description:	Several reports have stated that a zero-day Flash vulnerability is being exploited through several Chinese hacker websites. All of the samples X-Force has seen target the vulnerability disclosed in this Advisory, and X-Force has confirmed that the IPS protection released in November of 2007 does block these samples that are circulating in the wild. The specific signature that covers this issue is Multimedia_File_Overflow and is on and blocked by default in the Trust X-Force policy. For more details, see ISS Product Coverage Section below. Some public reports have claimed that the exploits target an unpatched vulnerability, but the samples X-Force has analyzed do not confirm that statement. X-Force will update this Advisory with additional details as they emerge. Brief description: Adobe Flash Player is vulnerable to a buffer overflow, caused by an integer overflow vulnerability in the processing of multimedia files. By creating a specially-crafted multimedia file and persuading the victim to open the file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
Discoverer:	Mark Dowd of IBM X-Force

ISS Coverage

Product	Content Version
Proventia Network IDS Proventia Network IPS Proventia Network MFS Proventia Server (Linux) RealSecure Network RealSecure Server Sensor	27.110
Proventia Desktop Proventia Server IPS (Windows)	2120

Propagation Techniques	ISS Protection	Available
remote exploit	Multimedia_File_Overflow	Nov 13, 2007

Detailed Description

Business Impact:	Compromise of networks and machines using affected versions of Flash may lead to exposure of confidential information, loss of productivity, and further network compromise. Remote code execution could be achieved by enticing a user to click a link in an email, on a web page, or other method that might embed content that is interpreted by the Adobe Flash Player.
CVSS	Base Score:		9.3
		Access Vector:	Network
		Access Complexity:	Medium
		Authentication:	None
		Confidentiality Impact:	Complete
		Integrity Impact:	Complete
		Availability Impact:	Complete

	Adjusted Temporal Score:		6.9
		Exploitability:	Unproven
		Remediation Level:	Official-Fix
		Report Confidence:	Confirmed
Affected Products:	For a full list of affected versions, see references below.
Technical Description:	Adobe Flash Player does not properly handle a specific tag that can exist in multimedia files. Improper handling of certain values causes a pointer calculation to go awry, which allows the attacker to write to any memory location and execute code.
Remediation:	Patches are available for this issue. See References for details.

References

XFDB:	http://xforce.iss.net/xforce/xfdb/37277
Adobe:	http://www.adobe.com/support/security/bulletins/apsb08-11.html

Revision History

1.0	Initial publication.
1.1	Live exploitation reported May 27, 2008.

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