CVE-2018-11891 in Android
Summary
by MITRE
In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, lack of check on the length of array while accessing can lead to an out of bound read in WLAN HOST function.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 05/17/2023
This vulnerability exists within the Android operating system ecosystem specifically affecting devices utilizing the Linux kernel and Qualcomm Snapdragon chipsets. The issue manifests in the WLAN HOST function where insufficient validation occurs on array length parameters during memory access operations. This flaw affects multiple Android variants including Android for MSM, Firefox OS for MSM, and QRD Android platforms, indicating a widespread impact across Qualcomm-based mobile devices. The vulnerability represents a classic out-of-bounds read condition that can be exploited by malicious actors to access memory locations beyond the allocated array boundaries.
The technical implementation of this vulnerability stems from inadequate input validation within the wireless networking subsystem. When the WLAN HOST function processes array-based data structures, it fails to verify that accessed indices remain within legitimate bounds before performing memory reads. This absence of boundary checking creates a scenario where an attacker can manipulate input parameters to cause the system to read memory locations that were not intended for access. The flaw specifically impacts the Linux kernel implementations used by these mobile platforms, making it particularly concerning given the widespread adoption of Qualcomm chipsets in mobile devices.
The operational impact of this vulnerability extends beyond simple memory corruption as it can potentially enable attackers to extract sensitive information from kernel memory spaces. An attacker exploiting this condition could potentially read confidential data such as cryptographic keys, user credentials, or other sensitive information stored in memory. The vulnerability's presence in multiple Android variants suggests it could affect a substantial portion of the mobile device market, particularly devices manufactured by companies utilizing Qualcomm's Snapdragon processors. This creates a significant risk for organizations relying on these platforms for mobile device management and security.
From a cybersecurity perspective, this vulnerability aligns with CWE-129 which specifically addresses insufficient validation of length parameters in array access operations. The flaw also maps to several ATT&CK techniques including privilege escalation and credential access, as successful exploitation could provide attackers with elevated privileges or sensitive data extraction capabilities. Mitigation strategies should focus on implementing proper input validation mechanisms and boundary checks within the WLAN HOST function implementation. Additionally, regular security updates and patches from device manufacturers are crucial to address this vulnerability, as the flaw exists in the core kernel implementation rather than application-level code. Organizations should also consider network-based monitoring solutions to detect potential exploitation attempts targeting this specific memory access vulnerability.