CVE-2019-20911 Explained : Impact and Mitigation

GNU LibreDWG version 0.9.3 is affected by a vulnerability that can lead to a denial of service due to a specific issue in the bit_calc_CRC function.

Understanding CVE-2019-20911

This CVE involves a vulnerability in GNU LibreDWG version 0.9.3 that can be exploited to cause a denial of service.

What is CVE-2019-20911?

An issue in GNU LibreDWG through version 0.9.3 can result in a denial of service when manipulated input triggers the vulnerability in the bit_calc_CRC function.

The Impact of CVE-2019-20911

The vulnerability can be exploited to cause a denial of service, potentially disrupting the normal operation of systems using the affected version of GNU LibreDWG.

Technical Details of CVE-2019-20911

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in GNU LibreDWG version 0.9.3 is triggered by specific malicious input, leading to a denial of service in the bit_calc_CRC function within the bits.c file.

Affected Systems and Versions

Affected Version: 0.9.3
Systems using GNU LibreDWG version 0.9.3 are vulnerable to this issue.

Exploitation Mechanism

The vulnerability is exploited by providing crafted input that triggers the flaw in the bit_calc_CRC function, specifically related to a for loop.

Mitigation and Prevention

Protecting systems from CVE-2019-20911 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to a patched version of GNU LibreDWG to mitigate the vulnerability.
Monitor for any unusual system behavior that could indicate a denial of service attack.

Long-Term Security Practices

Regularly update software and libraries to prevent known vulnerabilities.
Implement input validation mechanisms to filter out potentially malicious inputs.

Patching and Updates

Apply patches provided by GNU LibreDWG to address the vulnerability.