CVE-2006-0383 in Mac OS X
Summary
by MITRE
IPSec when used with VPN networks in Mac OS X 10.4 through 10.4.5 allows remote attackers to cause a denial of service (application crash) via unspecified vectors involving the "incorrect handling of error conditions".
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/08/2021
The vulnerability described in CVE-2006-0383 represents a critical flaw in the IPSec implementation within Mac OS X versions 10.4 through 10.4.5, specifically affecting VPN network operations. This issue manifests when IPSec is employed in conjunction with VPN networks, creating a potential attack vector that can be exploited by remote adversaries to disrupt system functionality. The vulnerability stems from improper error condition handling within the IPSec framework, which governs secure network communications through encryption and authentication protocols. When malformed or unexpected network packets are processed by the IPSec subsystem, the system fails to properly manage these error states, leading to application crashes and subsequent denial of service conditions that compromise network connectivity for legitimate users.
The technical exploitation of this vulnerability involves sending specifically crafted network packets that trigger the flawed error handling mechanism within the IPSec implementation. This type of vulnerability falls under the category of improper error handling as classified by CWE-704, which encompasses issues where software fails to properly manage exceptional conditions or error states that occur during normal operation. The flaw demonstrates characteristics consistent with CWE-248, which addresses the exposure of an exception to an unexpected environment, where error conditions that should be gracefully handled instead cause system instability. Attackers can leverage this weakness by constructing packets that, when processed by the IPSec subsystem, trigger memory corruption or invalid state transitions that result in application termination. The vulnerability affects the core network security infrastructure of the operating system, making it particularly dangerous as it can disrupt secure communications that organizations depend upon for protecting sensitive data transfers.
The operational impact of this vulnerability extends beyond simple service disruption, as it can severely compromise the integrity of secure network communications that rely on IPSec and VPN technologies. Organizations utilizing Mac OS X systems for remote access or secure network connections face significant risks when this vulnerability remains unpatched, as attackers can systematically cause service interruptions that may go unnoticed until the impact becomes severe enough to affect business operations. The vulnerability's remote exploitability means that attackers do not require physical access to the system, allowing them to target network infrastructure from external locations. This characteristic aligns with ATT&CK technique T1499.004, which describes network denial of service attacks that target network infrastructure components. The potential for widespread disruption increases when considering that many organizations depend on VPN connectivity for remote work scenarios, making this vulnerability particularly concerning for enterprise environments where continuous network availability is critical for business continuity and security operations.
The mitigation strategies for CVE-2006-0383 primarily focus on applying the official security patches released by Apple to address the specific error handling flaws within the IPSec implementation. System administrators should prioritize updating affected Mac OS X systems to versions that contain the necessary fixes, as these patches typically modify the error handling routines to properly manage exceptional network conditions without causing application crashes. Network monitoring solutions should be implemented to detect unusual traffic patterns that might indicate exploitation attempts, particularly focusing on IPSec-related packet structures and connection attempts. Organizations should also consider implementing network segmentation strategies that limit the impact of potential exploitation by isolating critical network segments from less secure environments. Additionally, maintaining up-to-date firewall configurations and intrusion detection systems can help identify and block malicious traffic patterns associated with this vulnerability. The remediation process should include comprehensive testing of updated systems to ensure that the patches do not introduce compatibility issues with existing network configurations while maintaining the security enhancements necessary to protect against this specific denial of service threat.