CVE-2019-1712 : Vulnerability Insights and Analysis
Learn about CVE-2019-1712 affecting Cisco IOS XR Software. Discover the impact, affected versions, exploitation mechanism, and mitigation steps to secure your systems.
Cisco IOS XR Software Protocol Independent Multicast Denial of Service Vulnerability
Understanding CVE-2019-1712
A vulnerability in Cisco IOS XR Software's Protocol Independent Multicast (PIM) feature could allow an unauthenticated remote attacker to cause a denial of service by restarting the PIM process.
What is CVE-2019-1712?
The flaw in Cisco IOS XR Software's PIM feature enables an attacker to send crafted AutoRP packets to trigger a restart of the PIM process, rendering the device unable to provide services.
The Impact of CVE-2019-1712
The vulnerability allows attackers to disrupt services on affected devices by exploiting the mishandling of specific AutoRP packets, potentially leading to a denial of service situation.
Technical Details of CVE-2019-1712
The technical aspects of the vulnerability are crucial for understanding its implications and potential risks.
Vulnerability Description
The flaw in Cisco IOS XR Software's PIM feature allows remote attackers to restart the PIM process by sending crafted AutoRP packets to UDP port 496 on the targeted device.
Affected Systems and Versions
- Product: Cisco IOS XR Software
- Vendor: Cisco
- Vulnerable Versions: Versions earlier than 6.2.3, 6.3.2, 6.4.0, and 6.5.1
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: None
- User Interaction: None
- Scope: Changed
- CVSS Base Score: 5.8 (Medium)
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are essential to mitigate the risks associated with CVE-2019-1712.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any suspicious activity related to PIM processes.
- Implement firewall rules to restrict access to UDP port 496.
Long-Term Security Practices
- Regularly update and patch all software and firmware on network devices.
- Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.
- Educate network administrators and users about potential threats and best security practices.
Patching and Updates
- Cisco has released patches to address the vulnerability in affected versions of IOS XR Software.
- Ensure that all vulnerable systems are updated to versions 6.2.3, 6.3.2, 6.4.0, or 6.5.1 to prevent exploitation.