CVE-2008-0778 in QuickTime
Summary
by MITRE
Multiple stack-based buffer overflows in an ActiveX control in QTPlugin.ocx for Apple QuickTime 7.4.1 and earlier allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via long arguments to the (1) SetBgColor, (2) SetHREF, (3) SetMovieName, (4) SetTarget, and (5) SetMatrix methods.
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Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2008-0778 represents a critical security flaw in Apple QuickTime's QTPlugin.ocx ActiveX control version 7.4.1 and earlier. This issue manifests as multiple stack-based buffer overflows that occur when processing excessively long arguments passed to specific methods within the ActiveX control. The affected methods include SetBgColor, SetHREF, SetMovieName, SetTarget, and SetMatrix, all of which are part of the QuickTime plugin's interface for web browsers. The vulnerability resides in the improper handling of user-supplied input data, creating conditions where maliciously crafted arguments can overflow the allocated stack buffers and potentially overwrite adjacent memory regions.
From a technical perspective, this vulnerability operates through stack buffer overflow mechanisms that are classified under CWE-121 as stack-based buffer overflow conditions. The ActiveX control fails to validate the length of input parameters before copying them into fixed-size stack buffers, allowing attackers to exceed the buffer boundaries. When these methods receive arguments longer than the allocated buffer space, the excess data overflows into adjacent memory locations, potentially corrupting the stack frame. This corruption can lead to unpredictable program behavior, including crashes during normal operation or more severe consequences when the overflowed memory contains critical program control data such as return addresses or function pointers.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to potentially enable remote code execution. Attackers can leverage these buffer overflows to inject and execute arbitrary code on vulnerable systems, particularly when the overflow affects the return address or other critical stack elements. The attack vector requires a user to visit a malicious web page that loads the vulnerable QuickTime ActiveX control, making it a client-side exploitation scenario that aligns with ATT&CK technique T1203 for Exploitation for Client Execution. The vulnerability affects systems running vulnerable versions of QuickTime on Windows platforms where ActiveX controls are supported, creating a significant risk for enterprise environments where users may encounter malicious content through web browsing activities.
Mitigation strategies for this vulnerability involve immediate patching of the QuickTime plugin to version 7.5.0 or later, which contains fixes for these buffer overflow conditions. System administrators should also implement browser security configurations that restrict ActiveX control loading or disable them entirely for untrusted content. Network-level defenses can include web application firewalls that monitor for suspicious argument lengths in QuickTime-related method calls and blocking potentially malicious requests. Additionally, users should be educated about the risks of visiting untrusted websites and the importance of keeping software updated. The vulnerability demonstrates the importance of input validation and proper memory management in ActiveX controls, highlighting the need for comprehensive security testing of browser plugin components and adherence to secure coding practices that prevent buffer overflow conditions through techniques such as stack canaries, address space layout randomization, and bounds checking mechanisms. Organizations should also consider implementing application whitelisting policies that restrict execution of known vulnerable ActiveX controls until proper security patches are deployed across all affected systems.