CVE-2020-25464 : Exploit Details and Defense Strategies
Learn about CVE-2020-25464, a heap buffer overflow vulnerability in Moddable SDK before 20200903, potentially leading to crashes and code execution. Find mitigation steps and preventive measures here.
Moddable SDK before 20200903 is prone to a heap buffer overflow vulnerability in moddable/xs/sources/xsDebug.c. This can lead to a crash due to a partially initialized stack frame.
Understanding CVE-2020-25464
This CVE describes a heap buffer overflow vulnerability in Moddable SDK that can result in a crash when sending the stack frame to the debugger.
What is CVE-2020-25464?
The vulnerability occurs in moddable/xs/sources/xsDebug.c in Moddable SDK before 20200903. The issue arises from a stack overflow during the creation of the top stack frame, leading to partial initialization and subsequent crashes.
The Impact of CVE-2020-25464
The vulnerability can be exploited to cause a crash in the code responsible for sending the stack frame to the debugger, potentially leading to denial of service or arbitrary code execution.
Technical Details of CVE-2020-25464
Moddable SDK before 20200903 is affected by a heap buffer overflow vulnerability in xsDebug.c.
Vulnerability Description
The top stack frame is incompletely initialized due to a stack overflow during its creation, resulting in a crash when sending the frame to the debugger.
Affected Systems and Versions
- Product: Moddable SDK
- Vendor: Moddable
- Versions: All versions before 20200903
Exploitation Mechanism
The vulnerability is exploited by triggering a stack overflow during the creation of the top stack frame, leading to a crash in the code responsible for sending the frame to the debugger.
Mitigation and Prevention
To address CVE-2020-25464, follow these steps:
Immediate Steps to Take
- Update Moddable SDK to version 20200903 or later to mitigate the vulnerability.
- Monitor for any unusual debugger activity that could indicate exploitation of the heap buffer overflow.
Long-Term Security Practices
- Implement secure coding practices to prevent buffer overflows and stack corruption.
- Regularly update software components to patch known vulnerabilities.
Patching and Updates
- Apply patches and updates provided by Moddable to fix the heap buffer overflow vulnerability in the SDK.