CVE-2019-18804 : Exploit Details and Defense Strategies
Learn about CVE-2019-18804, a NULL pointer dereference vulnerability in DjVuLibre version 3.5.27, allowing attackers to trigger denial of service or execute arbitrary code. Find mitigation steps and preventive measures here.
A NULL pointer dereference vulnerability was discovered in DjVuLibre version 3.5.27, specifically in the IW44EncodeCodec.cpp file. This vulnerability could be exploited by an attacker to cause a denial of service or potentially execute arbitrary code.
Understanding CVE-2019-18804
This CVE identifier pertains to a specific vulnerability in DjVuLibre version 3.5.27.
What is CVE-2019-18804?
The vulnerability involves a NULL pointer dereference in the function DJVU::filter_fv within the IW44EncodeCodec.cpp file of DjVuLibre version 3.5.27.
The Impact of CVE-2019-18804
The vulnerability could allow an attacker to exploit the NULL pointer dereference to trigger a denial of service condition or potentially execute arbitrary code on the affected system.
Technical Details of CVE-2019-18804
This section provides more technical insights into the CVE-2019-18804 vulnerability.
Vulnerability Description
The vulnerability arises due to a NULL pointer dereference in the DJVU::filter_fv function within the IW44EncodeCodec.cpp file of DjVuLibre version 3.5.27.
Affected Systems and Versions
- Product: DjVuLibre
- Version: 3.5.27
- Status: Affected
Exploitation Mechanism
The vulnerability can be exploited by an attacker to manipulate the NULL pointer dereference, potentially leading to a denial of service or arbitrary code execution.
Mitigation and Prevention
To address CVE-2019-18804, it is crucial to implement appropriate mitigation strategies and preventive measures.
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Consider implementing network-level protections to detect and block exploit attempts.
- Monitor system logs for any suspicious activities that could indicate exploitation.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security assessments and penetration testing to identify and remediate weaknesses.
- Educate users and administrators about secure coding practices and the importance of timely updates.
Patching and Updates
Ensure that DjVuLibre version 3.5.27 is updated with the latest security patches to mitigate the CVE-2019-18804 vulnerability.