CVE-2017-15865 : What You Need to Know
Learn about CVE-2017-15865 affecting FRRouting and Cumulus Linux. Attackers exploit a vulnerability to retrieve sensitive information by sending malformed BGP UPDATE packets.
In FRRouting (FRR) versions prior to 2.0.2 and 3.x versions before 3.0.2, a vulnerability exists that allows attackers to retrieve sensitive information by sending a malformed BGP UPDATE packet.
Understanding CVE-2017-15865
This CVE, also known as RN-690 (or CM-18492), affects FRRouting and Cumulus Linux versions.
What is CVE-2017-15865?
The vulnerability in FRRouting and Cumulus Linux versions allows attackers to obtain sensitive information by exploiting a mishandling of attribute length in BGP UPDATE packets.
The Impact of CVE-2017-15865
Attackers can exploit this vulnerability to retrieve sensitive data by sending specially crafted BGP UPDATE packets, potentially leading to unauthorized access to critical information.
Technical Details of CVE-2017-15865
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in FRRouting and Cumulus Linux versions allows remote attackers to obtain sensitive information by sending malformed BGP UPDATE packets from connected peers, causing the transmission of unintended bytes due to mishandled attribute length.
Affected Systems and Versions
- FRRouting versions prior to 2.0.2 and 3.x versions before 3.0.2
- Cumulus Linux versions before 3.4.3
Exploitation Mechanism
Attackers exploit this vulnerability by sending malformed BGP UPDATE packets from connected peers, triggering the transmission of unintended bytes due to improper handling of attribute length.
Mitigation and Prevention
Protecting systems from CVE-2017-15865 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches provided by FRRouting and Cumulus Networks promptly.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories from FRRouting and Cumulus Networks.
- Apply security updates and patches as soon as they are available.