CVE-2023-31147 : Vulnerability Insights and Analysis
Learn about the CVE-2023-31147 affecting c-ares library, using insecure random values for DNS query IDs, its implications, and mitigation steps.
A detailed analysis of CVE-2023-31147 highlighting the impact, technical details, and mitigation strategies.
Understanding CVE-2023-31147
Exploring the implications of insufficient randomness in the generation of DNS query IDs in c-ares library.
What is CVE-2023-31147?
c-ares, an asynchronous resolver library, utilizes non-secure random number generation for DNS query IDs, potentially leading to predictable output. The issue has been addressed in version 1.19.1.
The Impact of CVE-2023-31147
The vulnerability in c-ares may compromise the integrity of DNS query IDs due to the lack of a cryptographically secure random number generator, potentially enabling predictability in output.
Technical Details of CVE-2023-31147
Exploring the specific vulnerabilities present in c-ares and how they impact systems.
Vulnerability Description
c-ares relies on inadequate randomness via rand() when robust random number generators are unavailable, leading to predictable DNS query ID generation. The issue has been rectified in version 1.19.1.
Affected Systems and Versions
c-ares versions before 1.19.1 are susceptible to this vulnerability, potentially impacting systems relying on DNS query ID generation.
Exploitation Mechanism
The vulnerability in c-ares arises from the use of subpar random number generation methods, making it easier for threat actors to predict DNS query IDs.
Mitigation and Prevention
Guidelines for mitigating the risks associated with CVE-2023-31147 and preventing future vulnerabilities.
Immediate Steps to Take
Users are advised to update c-ares to version 1.19.1 or above to address the vulnerability promptly and enhance the security of DNS query ID generation.
Long-Term Security Practices
Implementing secure random number generation practices and staying updated on security advisories can help mitigate similar vulnerabilities in the future.
Patching and Updates
Regularly monitoring for security patches and applying updates as they become available is crucial in maintaining the integrity of c-ares library.