CVE-2018-20673 : Security Advisory and Response
Learn about CVE-2018-20673, an integer overflow vulnerability in the demangle_template function in GNU libiberty, potentially leading to a heap-based buffer overflow. Find out how to mitigate this issue.
An integer overflow vulnerability in the demangle_template function in GNU libiberty, as distributed in GNU Binutils 2.31.1, can lead to a heap-based buffer overflow.
Understanding CVE-2018-20673
This CVE entry describes a specific vulnerability in the demangle_template function within GNU libiberty.
What is CVE-2018-20673?
The vulnerability arises from an integer overflow issue when creating an array to store template argument values, potentially resulting in a heap-based buffer overflow. The vulnerability has been demonstrated by the nm tool.
The Impact of CVE-2018-20673
The presence of this vulnerability can allow attackers to trigger a heap-based buffer overflow, which may lead to arbitrary code execution or denial of service.
Technical Details of CVE-2018-20673
This section provides more technical insights into the vulnerability.
Vulnerability Description
The demangle_template function in cplus-dem.c within GNU libiberty, as distributed in GNU Binutils 2.31.1, contains an integer overflow vulnerability that can trigger a heap-based buffer overflow.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions affected
Exploitation Mechanism
The vulnerability occurs during the creation of an array to store template argument values, leading to the potential for a heap-based buffer overflow.
Mitigation and Prevention
Protecting systems from CVE-2018-20673 requires immediate action and long-term security practices.
Immediate Steps to Take
- Apply patches or updates provided by the software vendor.
- Monitor security advisories for any new information or patches related to this vulnerability.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement secure coding practices to prevent buffer overflows and other memory-related vulnerabilities.
- Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
- Consider using security tools that can detect and prevent buffer overflow attacks.
Patching and Updates
Ensure that the affected software components are updated with the latest patches to mitigate the vulnerability.