CVE-2019-12669 : Exploit Details and Defense Strategies
Learn about CVE-2019-12669, a vulnerability in Cisco IOS XE Software allowing remote attackers to trigger a denial of service condition. Find mitigation steps and prevention measures here.
Cisco IOS and IOS XE Software Change of Authorization Denial of Service Vulnerability
Understanding CVE-2019-12669
This CVE involves a security issue in the RADIUS Change of Authorization (CoA) code in Cisco TrustSec, a component in Cisco IOS XE Software, potentially leading to a denial of service (DoS) attack.
What is CVE-2019-12669?
The vulnerability arises from inadequate handling of malformed packets, allowing unauthorized remote attackers to trigger a DoS condition on the targeted device by sending specially crafted packets.
The Impact of CVE-2019-12669
If exploited successfully, this vulnerability could result in a denial of service (DoS) on the affected device, disrupting its normal operation and potentially causing downtime.
Technical Details of CVE-2019-12669
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in the RADIUS Change of Authorization (CoA) code of Cisco TrustSec within Cisco IOS XE Software allows unauthenticated remote attackers to cause a DoS condition on affected devices due to improper handling of malformed packets.
Affected Systems and Versions
- Product: Cisco IOS XE Software 3.2.9SG
- Vendor: Cisco
- Version: Unspecified
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Availability Impact: High
- Base Score: 6.8 (Medium Severity)
- Privileges Required: None
- Scope: Changed
- User Interaction: None
Mitigation and Prevention
Protecting systems from CVE-2019-12669 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security assessments and penetration testing to identify and mitigate risks.
- Educate users and IT staff on best security practices to prevent future incidents.
Patching and Updates
- Check for security advisories from Cisco and apply recommended patches.
- Keep systems up to date with the latest software versions to mitigate known vulnerabilities.