CVE-2020-21827 : Vulnerability Insights and Analysis
Learn about CVE-2020-21827, a critical heap-based buffer overflow vulnerability in GNU LibreDWG 0.10 that could allow attackers to execute arbitrary code or cause denial of service. Find out how to mitigate the risk and protect your systems.
A heap-based buffer overflow vulnerability in GNU LibreDWG 0.10 allows attackers to execute arbitrary code or cause a denial of service via a crafted DWG file.
Understanding CVE-2020-21827
This CVE involves a critical vulnerability in GNU LibreDWG 0.10 that could be exploited by malicious actors to compromise systems.
What is CVE-2020-21827?
The vulnerability stems from a heap-based buffer overflow issue in GNU LibreDWG 0.10, specifically in the read_2004_compressed_section function in decode.c at line 2379.
The Impact of CVE-2020-21827
Exploitation of this vulnerability could lead to arbitrary code execution or denial of service on systems running the affected version of GNU LibreDWG.
Technical Details of CVE-2020-21827
This section delves into the technical aspects of the CVE.
Vulnerability Description
A heap-based buffer overflow vulnerability exists in GNU LibreDWG 0.10 via the read_2004_compressed_section function in decode.c, potentially allowing attackers to execute arbitrary code or trigger a DoS condition.
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 to trigger the buffer overflow, leading to potential code execution or service disruption.
Mitigation and Prevention
Protecting systems from CVE-2020-21827 requires immediate action and long-term security measures.
Immediate Steps to Take
- Apply security patches or updates provided by the vendor promptly.
- Implement proper input validation to prevent buffer overflow attacks.
- Consider restricting access to vulnerable systems.
Long-Term Security Practices
- Regularly update software and systems to mitigate known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address weaknesses.
- Educate users and IT staff on secure coding practices and threat awareness.
Patching and Updates
- Check for patches or security advisories from GNU LibreDWG and apply them as soon as they are available to address the vulnerability.