CVE-2019-13224 : Exploit Details and Defense Strategies
Learn about CVE-2019-13224, a use-after-free vulnerability in Oniguruma 6.9.2, potentially leading to information disclosure, denial of service, or code execution. Find mitigation steps and preventive measures.
A potential use-after-free vulnerability exists in the function onig_new_deluxe() within the regext.c file of Oniguruma 6.9.2. This vulnerability can lead to security risks such as information disclosure, denial of service, and potential execution of malicious code.
Understanding CVE-2019-13224
This CVE involves a use-after-free vulnerability in Oniguruma 6.9.2, impacting various programming languages and optional libraries.
What is CVE-2019-13224?
The vulnerability in onig_new_deluxe() allows attackers to exploit a crafted regular expression, potentially causing information disclosure, denial of service, or code execution. It affects Oniguruma, Ruby, PHP, and Rust.
The Impact of CVE-2019-13224
The use-after-free vulnerability poses significant security risks, including potential information exposure, service disruption, and the execution of malicious code.
Technical Details of CVE-2019-13224
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The use-after-free in onig_new_deluxe() in regext.c of Oniguruma 6.9.2 allows attackers to exploit a crafted regular expression, potentially leading to information disclosure, denial of service, or code execution.
Affected Systems and Versions
- Product: Oniguruma 6.9.2
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
Attackers can exploit the vulnerability by providing a pair of a regex pattern and a string with multi-byte encoding, handled by onig_new_deluxe().
Mitigation and Prevention
Protecting systems from CVE-2019-13224 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security updates promptly
- Monitor for any unusual activities
- Implement regex pattern and string input validation
Long-Term Security Practices
- Regular security training for developers
- Conduct regular security audits
- Implement secure coding practices
Patching and Updates
- Update to the latest version of Oniguruma
- Follow vendor advisories for patches and fixes