RealPlayer Data Packet Stack Overflow
Release Date: November 10, 2005
Date Reported: May 28, 2005
Severity: High (Remote Code Execution)
Systems Affected: Windows: RealPlayer 10.5 (188.8.131.520-1235) RealPlayer 10 RealOne Player v2 RealOne Player v1 RealPlayer 8 RealPlayer Enterprise
Mac: RealPlayer 10
Linux: RealPlayer 10 (10.0.0 - 5) Helix Player (10.0.0 - 5)
Overview: eEye Digital Security has discovered a critical vulnerability in RealPlayer. The vulnerability allows a remote attacker to reliably overwrite stack memory with arbitrary data and execute arbitrary code in the context of the user who executed the player.
This specific flaw exists in the first data packet contained in a Real Media file. By specially crafting a malformed .rm movie file, a direct stack overwrite is triggered, and reliable code execution is then possible.
Technical Details: The vulnerability is triggered by setting the application specific length field of the [data packet + 1] to 0x80 - 0xFF this will cause a stack overflow. The value is sign-extended and passed as the length to memcpy.
Protection: Retina Network Security Scanner has been updated to identify this vulnerability. Blink End Point Protection proactively protects against this vulnerability
Vendor Status: RealNetworks has released a patch for this vulnerability. The patch is available via the "Check for Update" menu item under Tools on the RealPlayer menu bar or from http://service.real.com/realplayer/security/.
Credit: Karl Lynn
Related Links: This advisory has been assigned the following ID numbers;
EEYEB-20050510 OSVDB ID: 18822 CVE ID: CAN-2005-2629
Greetings: Brett Moore, Mark Dowd, Paul Gese @ RealNetworks, Mike Schiffman, AJREZ, Luke, Derek "TEX" Soeder, Andre Audits, "The Claw", and Dug Song.
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