CVE-2019-15513 : Security Advisory and Response
Learn about CVE-2019-15513, a vulnerability in OpenWrt libuci affecting Motorola CX2L MWR04L 1.01 and C1 MWR03 1.01 devices. Find out the impact, affected systems, exploitation method, and mitigation steps.
A problem was found in OpenWrt libuci, known as the Library for the Unified Configuration Interface, prior to version 15.05.1. This issue affects Motorola CX2L MWR04L 1.01 and C1 MWR03 1.01 devices. When a lengthy SetWanSettings command is received, the mishandling of /tmp/.uci/network locking occurs, resulting in a device hang.
Understanding CVE-2019-15513
This CVE involves a vulnerability in OpenWrt libuci affecting specific Motorola devices.
What is CVE-2019-15513?
CVE-2019-15513 is a vulnerability in OpenWrt libuci that leads to a device hang on Motorola CX2L MWR04L 1.01 and C1 MWR03 1.01 devices when processing a long SetWanSettings command.
The Impact of CVE-2019-15513
The mishandling of /tmp/.uci/network locking due to this vulnerability can result in a device hang, potentially causing service disruptions or denial of service.
Technical Details of CVE-2019-15513
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability in OpenWrt libuci before version 15.05.1 allows for the mishandling of /tmp/.uci/network locking, triggered by a lengthy SetWanSettings command, leading to a device hang.
Affected Systems and Versions
- OpenWrt libuci versions prior to 15.05.1
- Motorola CX2L MWR04L 1.01
- Motorola C1 MWR03 1.01
Exploitation Mechanism
The vulnerability is exploited by sending a lengthy SetWanSettings command to the affected devices, triggering the mishandling of /tmp/.uci/network locking and causing the device to hang.
Mitigation and Prevention
Protecting systems from CVE-2019-15513 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the latest security patches provided by OpenWrt to mitigate the vulnerability.
- Monitor network traffic for any suspicious activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update and patch all software and firmware to prevent known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Update OpenWrt libuci to version 15.05.1 or newer to address the vulnerability and prevent device hangs.