CVE-2008-0234 in QuickTime
Summary
by MITRE
Buffer overflow in Apple Quicktime Player 7.3.1.70 and other versions before 7.4.1, when RTSP tunneling is enabled, allows remote attackers to execute arbitrary code via a long Reason-Phrase response to an rtsp:// request, as demonstrated using a 404 error message.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 06/01/2025
The vulnerability identified as CVE-2008-0234 represents a critical buffer overflow flaw in Apple QuickTime Player versions prior to 7.4.1, specifically when RTSP tunneling functionality is active. This security weakness resides within the handling of network responses during real-time streaming protocol communications, creating a pathway for remote code execution attacks. The flaw manifests when the player receives a malformed RTSP response containing an excessively long Reason-Phrase field, which occurs during error conditions such as 404 Not Found responses. The vulnerability operates at the intersection of network protocol handling and memory management, where insufficient bounds checking allows attackers to overwrite adjacent memory locations with malicious code. This type of vulnerability falls under CWE-121, which describes heap-based buffer overflow conditions, and aligns with ATT&CK technique T1190 for Exploit Public-Facing Application, demonstrating how network-based applications can be targeted through protocol manipulation. The attack vector requires the victim to be actively engaged with QuickTime Player and to access a malicious RTSP stream, making it particularly dangerous in environments where users might encounter untrusted media content.
The technical implementation of this vulnerability exploits the improper memory allocation and handling within QuickTime Player's RTSP processing module. When RTSP tunneling is enabled, the player establishes connections to streaming servers and expects specific response formats including the Reason-Phrase field in HTTP-style responses. The buffer overflow occurs because the application does not properly validate the length of incoming Reason-Phrase data before copying it into a fixed-size buffer, allowing attackers to exceed the allocated memory space. This overflow can overwrite critical program memory including return addresses, function pointers, and other control data structures necessary for normal program execution. The exploitation process typically involves crafting a malicious RTSP server response that includes a specially constructed Reason-Phrase field exceeding the buffer capacity, causing the program to jump to attacker-controlled code rather than executing legitimate program flow. The vulnerability is particularly concerning because it can be triggered without requiring user interaction beyond opening the media player, making it suitable for automated attacks. The affected versions include QuickTime Player 7.3.1.70 and all earlier releases, while version 7.4.1 and later contain fixes that properly implement bounds checking and memory validation for RTSP response handling.
The operational impact of CVE-2008-0234 extends beyond simple remote code execution to encompass broader system compromise capabilities and potential for persistent threats. Successful exploitation allows attackers to execute arbitrary code with the privileges of the QuickTime Player process, which typically runs with user-level permissions but could potentially be leveraged for privilege escalation in certain system configurations. The vulnerability's remote nature means it can be exploited from anywhere on the internet without requiring physical access to the target system, making it particularly attractive for widespread attacks. Organizations using QuickTime Player for media playback in enterprise environments face significant risk, as the vulnerability can be exploited through various attack vectors including malicious websites, email attachments, or compromised media servers. The exploitation requires minimal technical expertise, as demonstrated by proof-of-concept code that could be readily adapted by threat actors. Additionally, the vulnerability's presence in widely deployed software creates a substantial attack surface, particularly in environments where users may unknowingly encounter malicious content. The RTSP protocol's use in streaming applications makes this vulnerability relevant not just to QuickTime Player but to any application implementing similar RTSP tunneling functionality, potentially affecting other media players and streaming applications that share similar code bases or protocols.
Mitigation strategies for CVE-2008-0234 focus on both immediate remediation and long-term security hardening measures. The primary recommendation involves upgrading to Apple QuickTime Player version 7.4.1 or later, which includes proper bounds checking and memory validation for RTSP response handling. Organizations should implement network segmentation and firewall rules to restrict access to RTSP ports and services, particularly when RTSP tunneling is not required for legitimate business operations. Disabling RTSP tunneling functionality within QuickTime Player when it is not needed provides an additional layer of defense, as the vulnerability requires this specific feature to be enabled for exploitation. Network monitoring should be enhanced to detect unusual RTSP traffic patterns and malformed responses that could indicate attempted exploitation. Security patches and updates should be applied promptly, with particular attention to legacy systems that may be running unsupported versions of QuickTime Player. System administrators should implement application whitelisting policies to restrict execution of unauthorized media players and ensure that only trusted versions of QuickTime Player are installed. Regular security assessments should include vulnerability scanning for outdated media player software, as this vulnerability represents a common target for automated exploitation tools. The fix implemented by Apple addresses the root cause by ensuring that all incoming RTSP response data undergoes proper length validation before memory allocation, preventing the overflow condition that previously enabled arbitrary code execution. Additionally, organizations should consider implementing intrusion detection systems that can identify and alert on suspicious RTSP protocol traffic patterns consistent with exploitation attempts.