CVE-2019-5613 : Security Advisory and Response
Learn about CVE-2019-5613, a FreeBSD 12.0-RELEASE-p13 vulnerability allowing acceptance of outdated packets, potentially leading to repeated actions. Find mitigation steps here.
FreeBSD 12.0-RELEASE-p13 ipsec Packet Processor Vulnerability
Understanding CVE-2019-5613
This CVE involves a vulnerability in the ipsec packet processor of FreeBSD 12.0-RELEASE-p13, allowing the acceptance of outdated packets, potentially leading to repeated actions.
What is CVE-2019-5613?
Prior to the release of FreeBSD 12.0-RELEASE-p13, a flaw in the ipsec packet processor allowed the acceptance and processing of outdated packets, which could result in the repetition of specific actions depending on the higher-level protocol used over ipsec.
The Impact of CVE-2019-5613
The vulnerability could be exploited to repeat actions, potentially affecting the integrity and security of systems utilizing ipsec.
Technical Details of CVE-2019-5613
This section provides more technical insights into the CVE.
Vulnerability Description
A missing check in the ipsec packet processor of FreeBSD 12.0-RELEASE before 12.0-RELEASE-p13 enables the reinjection of old packets, which can be accepted by the ipsec endpoint, allowing for potential action repetition.
Affected Systems and Versions
- Product: FreeBSD
- Version: 12.0 before 12.0-RELEASE-p13
Exploitation Mechanism
The vulnerability could be exploited by sending outdated packets to the ipsec endpoint, potentially causing the repetition of actions depending on the higher-level protocol in use.
Mitigation and Prevention
Protecting systems from CVE-2019-5613 is crucial to maintaining security.
Immediate Steps to Take
- Apply the necessary patch provided by FreeBSD to address the vulnerability.
- Monitor network traffic for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update and patch systems to prevent known vulnerabilities from being exploited.
- Implement network segmentation and access controls to limit the impact of potential security breaches.
Patching and Updates
Ensure that FreeBSD systems are updated to version 12.0-RELEASE-p13 or later to mitigate the ipsec packet processor vulnerability.