CVE-2020-24863 : Security Advisory and Response
Learn about CVE-2020-24863, a memory corruption vulnerability in MidnightBSD and FreeBSD that allows attackers to crash the system. Find out about affected systems, exploitation, and mitigation steps.
A memory corruption vulnerability in the kernel function kern_getfsstat in MidnightBSD and FreeBSD allows an attacker to crash the system.
Understanding CVE-2020-24863
A memory corruption vulnerability in MidnightBSD and FreeBSD that can lead to system crashes.
What is CVE-2020-24863?
This CVE identifies a memory corruption vulnerability in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, as well as in FreeBSD through version 11.4. The vulnerability enables an attacker to trigger an invalid free operation, potentially leading to a system crash, by utilizing a crafted size value in combination with an invalid mode.
The Impact of CVE-2020-24863
The vulnerability allows an attacker to exploit the system and potentially crash it by triggering an invalid free operation through specific crafted inputs.
Technical Details of CVE-2020-24863
Details about the vulnerability, affected systems, and exploitation mechanisms.
Vulnerability Description
A memory corruption vulnerability in the kernel function kern_getfsstat in MidnightBSD and FreeBSD allows an attacker to trigger an invalid free operation, leading to system crashes.
Affected Systems and Versions
- MidnightBSD before 1.2.7 and 1.3 through 2020-08-19
- FreeBSD through version 11.4
Exploitation Mechanism
The vulnerability can be exploited by an attacker through a crafted size value in conjunction with an invalid mode, potentially causing a system crash.
Mitigation and Prevention
Steps to mitigate the vulnerability and prevent exploitation.
Immediate Steps to Take
- Apply security patches provided by MidnightBSD and FreeBSD promptly.
- Monitor security advisories for updates and follow best security practices.
Long-Term Security Practices
- Regularly update and patch the system to address known vulnerabilities.
- Implement proper access controls and network security measures.
- Conduct regular security audits and assessments to identify and mitigate risks.
Patching and Updates
- MidnightBSD: Refer to security advisories on the official website for patching instructions.
- FreeBSD: Follow the security advisories on the official website for patching guidance.