ZDI-07-063: RealPlayer RA Field Size File Processing Heap Oveflow Vulnerability Oct 31 2007 11:14PM
zdi-disclosures 3com com
ZDI-07-063: RealPlayer RA Field Size File Processing Heap Oveflow



October 25, 2007

-- CVE ID:


-- Affected Vendor:

RealNetworks RealPlayer version 10.5

-- Affected Products:

RealPlayer 6.x

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability since April 26, 2007 by Digital Vaccine protection

filter ID 5214. For further product information on the TippingPoint IPS:


-- Vulnerability Details:

This vulnerability allows remote attackers to execute code on vulnerable

installations of RealPlayer. User interaction is required in that a

user must open a malicious .ra/.ram file or visit a malicious web


The specific flaw exists during the parsing of files with improperly

defined size field in the RA header. Specifying a large unsigned value

data can trigger a heap corruption and further result in arbitrary code

execution under the context of the logged in user.

-- Vendor Response:

RealNetworks has issued an update to correct this vulnerability. More

details can be found at:


-- Disclosure Timeline:

2007.02.16 - Vulnerability reported to vendor

2007.04.26 - Digital Vaccine released to TippingPoint customers

2007.10.25 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by an anonymous researcher.

-- About the Zero Day Initiative (ZDI):

Established by TippingPoint, a division of 3Com, The Zero Day Initiative

(ZDI) represents a best-of-breed model for rewarding security

researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research

through the ZDI can find more information and sign-up at:


The ZDI is unique in how the acquired vulnerability information is used.

3Com does not re-sell the vulnerability details or any exploit code.

Instead, upon notifying the affected product vendor, 3Com provides its

customers with zero day protection through its intrusion prevention

technology. Explicit details regarding the specifics of the

vulnerability are not exposed to any parties until an official vendor

patch is publicly available. Furthermore, with the altruistic aim of

helping to secure a broader user base, 3Com provides this vulnerability

information confidentially to security vendors (including competitors)

who have a vulnerability protection or mitigation product.

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