CVE-2018-19115 : What You Need to Know
Learn about CVE-2018-19115, a heap-based buffer overflow vulnerability in keepalived versions prior to 2.0.7, allowing for a denial of service (DoS) attack. Find out how to mitigate and prevent this vulnerability.
A heap-based buffer overflow vulnerability in keepalived versions prior to 2.0.7 allows for a denial of service (DoS) attack due to improper validation of HTTP status codes.
Understanding CVE-2018-19115
What is CVE-2018-19115?
This vulnerability arises from a lack of proper validation for status codes in the extract_status_code function, leading to a heap-based buffer overflow.
The Impact of CVE-2018-19115
The vulnerability can result in a DoS attack and potentially other unspecified impacts due to excessive data being written to the heap.
Technical Details of CVE-2018-19115
Vulnerability Description
- Heap-based buffer overflow in keepalived before 2.0.7
- Occurs during parsing of HTTP status codes
- Lack of validation in the extract_status_code function
Affected Systems and Versions
- Versions of keepalived prior to 2.0.7
Exploitation Mechanism
- Attackers can exploit this vulnerability to trigger a DoS attack by sending crafted HTTP status codes.
Mitigation and Prevention
Immediate Steps to Take
- Update keepalived to version 2.0.7 or later
- Monitor network traffic for any signs of exploitation
Long-Term Security Practices
- Regularly update and patch software to prevent known vulnerabilities
- Implement network segmentation and access controls
- Conduct regular security assessments and audits
Patching and Updates
- Apply patches provided by keepalived to address the buffer overflow vulnerability