CVE-2019-1789 : Exploit Details and Defense Strategies
Learn about CVE-2019-1789, a high severity denial of service vulnerability in ClamAV versions older than 0.101.2. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A denial of service vulnerability in ClamAV versions prior to 0.101.2 can lead to out-of-bounds heap read situations during the scanning of PE files.
Understanding CVE-2019-1789
This CVE involves a vulnerability in ClamAV that can result in a denial of service due to insufficient bound-checking measures.
What is CVE-2019-1789?
CVE-2019-1789 is a vulnerability in ClamAV versions older than 0.101.2 that can be exploited through out-of-bounds heap reads when scanning certain types of files.
The Impact of CVE-2019-1789
The vulnerability has a CVSS base score of 7.5, indicating a high severity issue with a significant impact on availability.
Technical Details of CVE-2019-1789
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows for a denial of service attack triggered by out-of-bounds heap reads during the scanning of specific file types.
Affected Systems and Versions
- Product: ClamAV
- Vendor: Cisco
- Versions Affected: Older than 0.101.2
Exploitation Mechanism
The vulnerability can be exploited by triggering out-of-bounds heap reads when scanning PE files, particularly Windows EXE and DLL files compressed with Aspack.
Mitigation and Prevention
Protecting systems from CVE-2019-1789 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update ClamAV to version 0.101.2 or newer to mitigate the vulnerability.
- Monitor security advisories for patches and updates from Cisco.
Long-Term Security Practices
- Implement proper input validation mechanisms to prevent similar vulnerabilities.
- Regularly update and patch software to address security flaws.
- Conduct security assessments and audits to identify and remediate vulnerabilities.
- Educate users on safe file handling practices to minimize risks.
- Consider implementing additional security layers such as intrusion detection systems.
Patching and Updates
Regularly check for updates and patches for ClamAV to ensure that known vulnerabilities are addressed.