CVE-2020-0144 in Android
Summary
by MITRE
In btm_proc_sp_req_evt of btm_sec.cc, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure via compromised device firmware with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-142543497
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Analysis
by VulDB Data Team • 06/12/2020
The vulnerability identified as CVE-2020-0144 resides within the Bluetooth security implementation of Android 10 systems, specifically within the btm_proc_sp_req_evt function located in the btm_sec.cc source file. This flaw represents a classic out-of-bounds read condition that occurs when the system fails to validate array boundaries before accessing memory locations. The vulnerability is categorized under CWE-129 as an insufficient bounds check, which directly enables malicious code to read memory beyond allocated buffers. The flaw exists in the Bluetooth security manager component that handles security procedures during Bluetooth device pairing and connection establishment processes.
The technical exploitation of this vulnerability requires an attacker to have system-level execution privileges, which means the adversary must already possess elevated access to the device. This prerequisite significantly reduces the attack surface but does not eliminate the risk entirely, as the vulnerability can be leveraged by malicious firmware or compromised applications that operate with system-level permissions. The out-of-bounds read allows for information disclosure, potentially exposing sensitive data from adjacent memory regions that could include cryptographic keys, session tokens, or other confidential information. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation.
The operational impact of CVE-2020-0144 extends beyond simple information disclosure, as it creates potential pathways for further exploitation within the Bluetooth subsystem. When an attacker successfully exploits this vulnerability, they can extract memory contents that may reveal implementation details of the Bluetooth security protocols, potentially enabling more sophisticated attacks against the device's wireless communications. The vulnerability affects Android 10 systems specifically, making it relevant for device manufacturers and security professionals monitoring for this particular flaw in their deployed fleets. The Android ID A-142543497 indicates this was properly tracked and addressed through the Android security patching process, though the vulnerability demonstrates the complexity of securing wireless communication protocols in mobile operating systems.
Mitigation strategies for this vulnerability involve applying the latest Android security patches that address the specific bounds checking issue in the Bluetooth security manager. System administrators should ensure all devices running Android 10 are updated with the latest security releases from their device manufacturers. Additionally, organizations should implement monitoring for suspicious Bluetooth activity and consider network-level controls to limit Bluetooth exposure in enterprise environments. The vulnerability highlights the importance of rigorous input validation in security-critical code sections and demonstrates why continuous security testing of mobile operating system components is essential. Network security teams should also be aware that this vulnerability could be exploited as part of a broader attack chain, particularly when combined with other Bluetooth-related vulnerabilities that may exist in the same codebase.