CVE-2020-7455 : What You Need to Know
Learn about CVE-2020-7455, a vulnerability in FreeBSD FTP packet handler that could disclose kernel or natd process space. Find mitigation steps and affected versions here.
In FreeBSD 12.1-STABLE before r360973, 12.1-RELEASE before p5, 11.4-STABLE before r360973, 11.4-BETA1 before p1, and 11.3-RELEASE before p9, a vulnerability exists in the FTP packet handler in libalias that could lead to the disclosure of kernel or natd process space due to incorrect packet length calculations.
Understanding CVE-2020-7455
This CVE entry pertains to an out-of-bounds read vulnerability in FreeBSD systems.
What is CVE-2020-7455?
This CVE describes a flaw in the FTP packet handler in libalias of FreeBSD versions, allowing for the disclosure of kernel or natd process space due to incorrect packet length calculations.
The Impact of CVE-2020-7455
The vulnerability could be exploited to reveal small amounts of kernel or natd process space, potentially leading to unauthorized access or information disclosure.
Technical Details of CVE-2020-7455
The technical aspects of the vulnerability are as follows:
Vulnerability Description
The issue involves the incorrect calculation of packet length by the FTP packet handler in libalias, leading to the exposure of kernel or natd process space.
Affected Systems and Versions
- FreeBSD 12.1-RELEASE before p5
- FreeBSD 11.4-BETA1 before p1
- FreeBSD 11.3-RELEASE before p9
Exploitation Mechanism
The vulnerability allows for the disclosure of small amounts of kernel or natd process space through manipulation of packet length calculations.
Mitigation and Prevention
To address CVE-2020-7455, consider the following steps:
Immediate Steps to Take
- Apply the necessary patches provided by FreeBSD to fix the vulnerability.
- Monitor system logs for any suspicious activities that might indicate exploitation.
Long-Term Security Practices
- Regularly update FreeBSD systems to the latest versions to ensure all security patches are applied.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
Ensure timely installation of security updates and patches released by FreeBSD to mitigate the risk of exploitation.