CVE-2024-29786 in Android
Summary
by MITRE • 06/14/2024
In pktproc_fill_data_addr_without_bm of link_rx_pktproc.c, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 07/11/2024
The vulnerability identified as CVE-2024-29786 represents a critical out-of-bounds write flaw within the pktproc_fill_data_addr_without_bm function of the link_rx_pktproc.c component. This issue resides in the network packet processing subsystem where the software fails to validate array bounds before writing data to memory locations. The absence of proper bounds checking creates a condition where maliciously crafted network packets could trigger memory corruption, potentially allowing attackers to overwrite adjacent memory regions with arbitrary data.
The technical nature of this vulnerability places it squarely within CWE-129, which addresses improper validation of array indices and other bounds checking failures. This flaw exists in the kernel-level packet processing code that handles incoming network traffic, making it particularly dangerous as it operates at a low level where memory corruption can directly translate into privilege escalation opportunities. The vulnerability's remote exploitability means that an attacker can trigger the condition without requiring any user interaction or local access, significantly broadening the attack surface. Network protocols that utilize this packet processing component become potential vectors for exploitation, as the attacker only needs to send specially crafted packets to the target system.
From an operational perspective, this vulnerability presents a severe risk to network infrastructure and systems that process incoming packets through the affected code path. The lack of user interaction requirements for exploitation means that automated attacks could be deployed against vulnerable systems, potentially leading to complete system compromise. The absence of additional execution privileges needed for exploitation indicates that even unprivileged network traffic could be leveraged to achieve remote code execution, making this particularly concerning for network-facing applications and services. The impact extends beyond simple memory corruption as the vulnerability could enable attackers to execute arbitrary code with the privileges of the affected process, potentially leading to full system compromise.
Security mitigations for CVE-2024-29786 should focus on immediate code validation and bounds checking implementation within the pktproc_fill_data_addr_without_bm function. The most effective approach involves adding comprehensive input validation before any memory writes occur, ensuring that array indices and buffer sizes are properly verified against expected ranges. System administrators should prioritize patching affected systems and monitoring for suspicious network traffic patterns that might indicate exploitation attempts. Network segmentation and intrusion detection systems should be configured to identify and block malformed packets that could exploit this vulnerability. Organizations should also consider implementing runtime protections such as stack canaries and address space layout randomization to make exploitation more difficult. The vulnerability's classification under ATT&CK technique T1059.007 for command and scripting interpreter and T1566 for malicious email attachments suggests that exploitation could lead to further lateral movement and persistence within compromised networks, making early remediation essential for maintaining overall security posture.