CVE-2019-15948 : Security Advisory and Response
Learn about CVE-2019-15948, a critical vulnerability in Texas Instruments CC256x and WL18xx Bluetooth controllers, allowing remote attackers to trigger a buffer overflow, leading to denial of service or arbitrary code execution.
The CC256x and WL18xx dual-mode Bluetooth controller devices from Texas Instruments are vulnerable to remote attacks that can lead to a denial of service or arbitrary code execution.
Understanding CVE-2019-15948
This CVE involves a buffer overflow vulnerability in the Bluetooth Low Energy advertising packet handling of Texas Instruments CC256x and WL18xx devices.
What is CVE-2019-15948?
The vulnerability allows remote attackers to exploit the LE scan mode, triggering a buffer overflow by sending a malformed Bluetooth Low Energy advertising packet. This can result in a denial of service or potential execution of arbitrary code.
The Impact of CVE-2019-15948
The exploitation of this vulnerability can have severe consequences, including service disruption and unauthorized code execution on affected devices.
Technical Details of CVE-2019-15948
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from improper handling of Bluetooth Low Energy advertising packets, leading to a buffer overflow.
Affected Systems and Versions
The affected versions include CC256xC-BT-SP 1.2, CC256xB-BT-SP 1.8, and WL18xx-BT-SP 4.4.
Exploitation Mechanism
Attackers exploit the LE scan mode by sending a specially crafted Bluetooth Low Energy advertising packet to trigger the buffer overflow.
Mitigation and Prevention
Protecting systems from this vulnerability requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches or updates provided by Texas Instruments promptly.
- Implement network segmentation to limit exposure to potential attacks.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update firmware and software to address security vulnerabilities.
- Conduct security assessments and penetration testing to identify and mitigate potential risks.
Patching and Updates
Ensure that all affected devices are updated with the latest patches and firmware releases to mitigate the vulnerability.