CVE-2012-3727 in iOS
Summary
by MITRE
Buffer overflow in the IPsec component in Apple iOS before 6 allows remote attackers to execute arbitrary code via a crafted racoon configuration file.
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Analysis
by VulDB Data Team • 04/13/2021
The vulnerability identified as CVE-2012-3727 represents a critical buffer overflow flaw within the IPsec implementation of Apple iOS versions prior to 6. This security weakness specifically affects the racoon configuration file processing functionality, which serves as the key component for managing IPsec security associations and cryptographic parameters in mobile environments. The flaw exists in the way the iOS operating system handles malformed racoon configuration data, creating a scenario where remote attackers can exploit this vulnerability to gain unauthorized code execution capabilities. The vulnerability impacts the core security infrastructure of mobile devices, potentially compromising the integrity and confidentiality of network communications that rely on IPsec protocols for protection.
The technical implementation of this buffer overflow occurs within the IPsec subsystem when processing racoon configuration files that contain maliciously crafted data structures. The flaw stems from inadequate input validation and bounds checking mechanisms within the racoon daemon or associated IPsec processing libraries. When the iOS system attempts to parse and process these malformed configuration files, the insufficient memory boundary checks cause data to overwrite adjacent memory locations, potentially leading to stack corruption or heap-based buffer overflows. This type of vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, though it may also manifest as heap-based overflow depending on the specific implementation details of the iOS IPsec processing code. The vulnerability is particularly dangerous because it operates within the kernel-level or system-level components that manage network security protocols, making it a prime target for attackers seeking persistent system compromise.
The operational impact of CVE-2012-3727 extends beyond simple code execution capabilities to encompass significant threats to mobile device security and network integrity. Remote attackers can exploit this vulnerability without requiring physical access to the device or user interaction, making it particularly dangerous in mobile environments where devices frequently connect to untrusted networks. The successful exploitation could enable attackers to gain root-level privileges on affected iOS devices, allowing them to install malicious applications, access encrypted data, monitor network traffic, or establish persistent backdoors. This vulnerability directly violates the principles of information security as defined by the CIA triad, potentially compromising confidentiality, integrity, and availability of mobile communications. The attack vector is particularly concerning given that racoon configuration files could be delivered through various means including compromised network services, malicious websites, or even legitimate configuration management systems that have been compromised, making the attack surface quite broad.
Mitigation strategies for CVE-2012-3727 primarily focus on immediate system updates and network security hardening measures. Apple addressed this vulnerability through iOS 6 updates that included enhanced input validation and memory boundary checking mechanisms within the IPsec processing components. Organizations should implement comprehensive patch management programs to ensure all iOS devices are updated to version 6 or later, as this represents the most effective remediation approach. Network administrators should also consider implementing additional security controls such as IPsec configuration file validation, network segmentation, and monitoring for unusual network activity that might indicate exploitation attempts. The vulnerability demonstrates the importance of secure coding practices and proper input validation, aligning with ATT&CK technique T1059.007 for command and scripting interpreter, as attackers could leverage this vulnerability to execute arbitrary commands on compromised devices. Additionally, organizations should consider implementing network-based intrusion detection systems that can identify patterns associated with racoon configuration file exploitation attempts, providing an additional layer of defense against potential attacks targeting this specific vulnerability.