CVE-2020-23894 : Exploit Details and Defense Strategies
Learn about CVE-2020-23894 affecting WildBit Viewer v6.6. Attackers can exploit this User Mode Write AV vulnerability in ntdll!RtlpCoalesceFreeBlocks+0x268 via a crafted tiff file, leading to a denial of service (DoS) attack.
WildBit Viewer v6.6 is affected by a User Mode Write AV vulnerability in ntdll!RtlpCoalesceFreeBlocks+0x268, allowing attackers to trigger a denial of service (DoS) through a maliciously crafted tiff file.
Understanding CVE-2020-23894
This CVE involves a specific vulnerability in WildBit Viewer v6.6 that can be exploited to cause a DoS attack.
What is CVE-2020-23894?
The CVE-2020-23894 vulnerability in WildBit Viewer v6.6 enables attackers to execute a User Mode Write AV in ntdll!RtlpCoalesceFreeBlocks+0x268 by utilizing a specially crafted tiff file, resulting in a DoS condition.
The Impact of CVE-2020-23894
Exploitation of this vulnerability can lead to a denial of service (DoS) attack on systems running the affected WildBit Viewer v6.6 version.
Technical Details of CVE-2020-23894
This section provides detailed technical insights into the CVE-2020-23894 vulnerability.
Vulnerability Description
The vulnerability allows attackers to trigger a User Mode Write AV in ntdll!RtlpCoalesceFreeBlocks+0x268 through a crafted tiff file in WildBit Viewer v6.6.
Affected Systems and Versions
- Product: WildBit Viewer v6.6
- Vendor: WildBit Software
- Version: Not applicable
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating a specially crafted tiff file to cause a denial of service (DoS) on systems running WildBit Viewer v6.6.
Mitigation and Prevention
Protecting systems from CVE-2020-23894 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable the affected software or restrict access to vulnerable components.
- Implement network-level protections to filter out malicious tiff files.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security assessments and penetration testing to identify and address vulnerabilities.
Patching and Updates
- Check for security updates from WildBit Software and apply patches to address the vulnerability in WildBit Viewer v6.6.