[NEWS] RealPlayer Data Packet Stack Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 11/14/05

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    To: list@securiteam.com
Date: 14 Nov 2005 16:20:10 +0200

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      RealPlayer Data Packet Stack Overflow
    ------------------------------------------------------------------------

    SUMMARY

    Lack of proper length validation in RealPlayer's data packet handling
    allows attackers to cause the program to execute arbitrary code using a
    buffer overflow.

    DETAILS

    Vulnerable Systems:
     * RealPlayer version 10.5 (6.0.12.1040-1235) for Windows
     * RealPlayer version 10 for Windows
     * RealOne Player v2 for Windows
     * RealOne Player v1 for Windows
     * RealPlayer version 8 for Windows
     * RealPlayer Enterprise for Windows
     * RealPlayer 10 for Mac
     * RealPlayer 10 (10.0.0 - 5) for Linux
     * Helix Player (10.0.0 - 5) for Linux

    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.

    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.

    Vendor Status:
    The vendor has issued a patch:
    <http://service.real.com/help/faq/security/051110_player/EN/>
    http://service.real.com/help/faq/security/051110_player/EN/

    CVE Information:
     <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2629>
    CAN-2005-2629

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:Advisories@eeye.com> Eeye.
    The vendor advisory can be found at:
    <http://service.real.com/help/faq/security/051110_player/EN/>
    http://service.real.com/help/faq/security/051110_player/EN/

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