Native Instruments Guitar Rig 4 Player v4.1.1 Insecure Library Loading Vulnerability

Title: Native Instruments Guitar Rig 4 Player v4.1.1 Insecure Library Loading Vulnerability
Advisory ID: ZSL-2010-4973
Type: Local/Remote
Impact: System Access
Risk: (5/5)
Release Date: 20.11.2010
GUITAR RIG 4 PLAYER is the free, modular and expandable effects processor from Native Instruments, combining creative effects routing possibilities with ease-of-use and pristine sound quality. The included FACTORY SELECTION library provides one stunning Amp emulation with Matched Cabinet, plus 20 effects and sound modifiers to shape and enhance any audio signal.
Guitar Rig 4 Player suffers from a DLL hijacking vulnerability, which could be exploited by remote attackers to compromise a vulnerable system. This issue is caused due to the application insecurely loading certain libraries ("libjack.dll") from the current working directory, which could allow attackers to execute arbitrary code by tricking a user into opening specific related files (.nkm and .nkp) from a network share.
Native Instruments GmbH -
Affected Version (Standalone)
Tested On
Microsoft Windows XP Professional SP3 (English)
Vendor Status
[06.11.2010] Vulnerability discovered.
[09.11.2010] Contact with the vendor.
[09.11.2010] Vendor replies.
[09.11.2010] Explained to the vendor that we want to report a vulnerability.
[09.11.2010] Vendor answers in confusion.
[09.11.2010] Explained in details what this is all about.
[10.11.2010] Vendor informs the corresponding department and stated that if they're interested, they'll contact us.
[18.11.2010] Nobody gets in touch with us.
[19.11.2010] Informed the vendor that the public disclosure will occur on 20th of November.
[20.11.2010] Public advisory released.
Vulnerability discovered by Gjoko Krstic - <>
[20.11.2010] - Initial release
[22.11.2010] - Added reference [1], [2] and [3]
[24.11.2010] - Added reference [4]
Zero Science Lab