CVE-2019-20800 : What You Need to Know

Cherokee through version 1.2.104 is vulnerable to an out-of-bounds write issue in the cherokee_handler_cgi_add_env_pair function, allowing remote attackers to exploit the system.

Understanding CVE-2019-20800

This CVE involves a specific vulnerability in the Cherokee web server that can be exploited by attackers.

What is CVE-2019-20800?

CVE-2019-20800 is a security vulnerability in Cherokee version 1.2.104 that enables remote attackers to trigger an out-of-bounds write in the cherokee_handler_cgi_add_env_pair function.

The Impact of CVE-2019-20800

The vulnerability allows attackers to execute a denial of service attack by sending an excessive number of request headers, potentially leading to system compromise.

Technical Details of CVE-2019-20800

Cherokee's vulnerability and its implications are detailed below.

Vulnerability Description

The vulnerability in Cherokee version 1.2.104 allows remote attackers to exploit an out-of-bounds write issue in the cherokee_handler_cgi_add_env_pair function.

Affected Systems and Versions

Affected Version: 1.2.104 of Cherokee

Exploitation Mechanism

Attackers can exploit this vulnerability by sending an excessive number of request headers, such as a GET request containing multiple instances of the "Host: 127.0.0.1" header.

Mitigation and Prevention

Protecting systems from CVE-2019-20800 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Cherokee to a patched version or apply vendor-supplied fixes.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent vulnerabilities.
Implement network security measures to detect and block malicious traffic.
Educate users and administrators about safe browsing practices.

Patching and Updates

Ensure timely application of security patches and updates to Cherokee to mitigate the risk of exploitation.