CVE-2017-7395 : What You Need to Know
Learn about CVE-2017-7395 affecting TigerVNC 1.7.1, allowing authenticated clients to crash the server via an integer overflow in SMsgReader.cxx SMsgReader::readClientCutText. Find mitigation steps and prevention measures.
TigerVNC 1.7.1 is susceptible to an authenticated client-triggered server crash due to an integer overflow vulnerability in SMsgReader.cxx SMsgReader::readClientCutText.
Understanding CVE-2017-7395
An integer overflow vulnerability in TigerVNC 1.7.1 allows an authenticated client to crash the server by exploiting a specific function.
What is CVE-2017-7395?
This CVE describes a security flaw in TigerVNC 1.7.1 that enables an authenticated client to crash the server by triggering an integer overflow in SMsgReader.cxx SMsgReader::readClientCutText.
The Impact of CVE-2017-7395
The vulnerability allows an authenticated client to crash the server, potentially leading to denial of service or other security implications.
Technical Details of CVE-2017-7395
TigerVNC 1.7.1 is affected by an integer overflow vulnerability that can be exploited by an authenticated client.
Vulnerability Description
The flaw resides in SMsgReader.cxx SMsgReader::readClientCutText, where an authenticated client can cause an integer overflow, resulting in a server crash.
Affected Systems and Versions
- Product: TigerVNC 1.7.1
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
An authenticated client can exploit the integer overflow vulnerability in SMsgReader.cxx SMsgReader::readClientCutText to crash the TigerVNC server.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2017-7395.
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Monitor network traffic for any suspicious activities.
- Restrict access to vulnerable systems.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security training for users to recognize and report potential security issues.
- Implement network segmentation to limit the impact of potential attacks.
- Employ intrusion detection systems to identify and respond to security incidents.
Patching and Updates
- Check for updates and patches from TigerVNC or the relevant vendor to address the integer overflow vulnerability.