CVE-2020-17469 : Exploit Details and Defense Strategies
Discover the impact of CVE-2020-17469, a vulnerability in FNET through version 4.6.4 leading to Denial-of-Service. Learn about affected systems, exploitation, and mitigation steps.
An issue was discovered in FNET through 4.6.4 where the code for IPv6 fragment reassembly leads to an uninitialized pointer dereference, causing Denial-of-Service.
Understanding CVE-2020-17469
This CVE involves a vulnerability in FNET through version 4.6.4 that can result in a Denial-of-Service due to an uninitialized pointer dereference in IPv6 reassembly.
What is CVE-2020-17469?
The vulnerability in FNET through version 4.6.4 allows attackers to trigger a Denial-of-Service by exploiting an uninitialized pointer dereference in IPv6 reassembly.
The Impact of CVE-2020-17469
The vulnerability can be exploited to cause a Denial-of-Service, potentially disrupting network services and operations.
Technical Details of CVE-2020-17469
This section provides detailed technical information about the CVE.
Vulnerability Description
The issue in FNET through 4.6.4 arises from the code for IPv6 fragment reassembly attempting to access a previous fragment without proper reference, leading to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c.
Affected Systems and Versions
- Affected Product: FNET through version 4.6.4
- Vendor: N/A
- Affected Version: N/A
Exploitation Mechanism
Attackers can exploit this vulnerability by sending network incoming fragments that trigger the uninitialized pointer dereference in IPv6 reassembly, causing a Denial-of-Service.
Mitigation and Prevention
Protecting systems from CVE-2020-17469 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches or updates provided by the vendor to address the vulnerability.
- Implement network monitoring to detect and mitigate potential exploitation attempts.
Long-Term Security Practices
- Regularly update and patch software to prevent known vulnerabilities.
- Conduct security assessments and audits to identify and address weaknesses in the network infrastructure.
Patching and Updates
- Stay informed about security advisories and updates from FNET to apply patches promptly and enhance system security.