CVE-2020-21831 Explained : Impact and Mitigation
Learn about CVE-2020-21831, a heap-based buffer overflow vulnerability in GNU LibreDWG 0.10 via read_2004_section_handles. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A heap-based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via read_2004_section_handles ../../src/decode.c:2637.
Understanding CVE-2020-21831
This CVE involves a specific vulnerability in GNU LibreDWG 0.10.
What is CVE-2020-21831?
The vulnerability is a heap-based buffer overflow in GNU LibreDWG 0.10, triggered by the function read_2004_section_handles in the decode.c file at line 2637.
The Impact of CVE-2020-21831
This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the buffer overflow.
Technical Details of CVE-2020-21831
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability is a heap-based buffer overflow in GNU LibreDWG 0.10, specifically in the function read_2004_section_handles in the decode.c file at line 2637.
Affected Systems and Versions
- Product: GNU LibreDWG 0.10
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious DWG file that triggers the buffer overflow when processed by GNU LibreDWG 0.10.
Mitigation and Prevention
Protecting systems from CVE-2020-21831 is crucial to maintaining security.
Immediate Steps to Take
- Apply security patches provided by the vendor if available.
- Consider implementing file input validation to prevent malicious files from triggering the vulnerability.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Conduct security assessments and penetration testing to identify and address vulnerabilities.
Patching and Updates
- Stay informed about security updates and patches released by GNU LibreDWG.
- Apply patches promptly to mitigate the risk of exploitation.