CVE-2020-21830 : What You Need to Know
Discover the heap-based buffer overflow vulnerability in GNU LibreDWG 0.10 via bit_calc_CRC ../../src/bits.c:2213. Learn about the impact, affected systems, exploitation, and mitigation steps.
A heap-based buffer overflow vulnerability has been identified in GNU LibreDWG 0.10, specifically in the bit_calc_CRC function located at ../../src/bits.c:2213.
Understanding CVE-2020-21830
This CVE entry describes a critical security issue in GNU LibreDWG 0.10 that could be exploited by attackers.
What is CVE-2020-21830?
The vulnerability is a heap-based buffer overflow in the bit_calc_CRC function of GNU LibreDWG 0.10, potentially allowing attackers to execute arbitrary code or crash the application.
The Impact of CVE-2020-21830
This vulnerability could lead to a denial of service (DoS) condition, remote code execution, or other malicious activities if exploited by threat actors.
Technical Details of CVE-2020-21830
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The vulnerability is a heap-based buffer overflow in the bit_calc_CRC function of GNU LibreDWG 0.10, which could be triggered by processing specially crafted DWG files.
Affected Systems and Versions
- Affected Product: GNU LibreDWG 0.10
- Affected Version: Not applicable
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious DWG files that trigger the buffer overflow when processed by the vulnerable bit_calc_CRC function.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-21830.
Immediate Steps to Take
- Update GNU LibreDWG to the latest patched version to address the buffer overflow vulnerability.
- Avoid opening DWG files from untrusted or unknown sources.
- Monitor vendor security advisories for updates and patches.
Long-Term Security Practices
- Implement secure coding practices to prevent buffer overflows and other memory-related vulnerabilities.
- Conduct regular security assessments and code reviews to identify and address potential vulnerabilities.
Patching and Updates
- Apply patches and updates provided by the GNU LibreDWG project to fix the heap-based buffer overflow vulnerability.