CVE-2017-10983 : Security Advisory and Response
Learn about CVE-2017-10983, a FreeRADIUS vulnerability allowing denial of service attacks due to an overflow error in DHCP option 63 decoding. Find mitigation steps and prevention measures.
A vulnerability in FreeRADIUS versions 2.x (before 2.2.10) and 3.x (before 3.0.15), designated as FR-GV-206, allows a denial of service due to an overflow error while decoding option 63 in the DHCP protocol.
Understanding CVE-2017-10983
This CVE involves a vulnerability in FreeRADIUS versions 2.x and 3.x that can lead to a denial of service attack.
What is CVE-2017-10983?
CVE-2017-10983, also known as FR-GV-206, is a vulnerability in FreeRADIUS versions 2.x and 3.x that enables a denial of service due to an overflow error during the decoding of option 63 in the DHCP protocol.
The Impact of CVE-2017-10983
The vulnerability can be exploited by attackers to cause a denial of service, potentially disrupting network services relying on FreeRADIUS.
Technical Details of CVE-2017-10983
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The issue in FreeRADIUS versions 2.x and 3.x allows for a denial of service attack by triggering an overflow error while processing option 63 in the DHCP protocol.
Affected Systems and Versions
- FreeRADIUS versions 2.x before 2.2.10
- FreeRADIUS versions 3.x before 3.0.15
Exploitation Mechanism
Attackers can exploit this vulnerability by sending specially crafted DHCP packets containing malicious data to the FreeRADIUS server, triggering the overflow error and causing a denial of service.
Mitigation and Prevention
Protecting systems from CVE-2017-10983 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the necessary patches provided by FreeRADIUS to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation attempts.
Long-Term Security Practices
- Regularly update FreeRADIUS to the latest versions to prevent known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Ensure that FreeRADIUS is kept up to date with the latest security patches to address vulnerabilities like CVE-2017-10983.