CVE-2019-1737 : Vulnerability Insights and Analysis
Learn about CVE-2019-1737, a high-severity vulnerability in Cisco IOS and IOS XE Software that allows remote attackers to trigger a denial of service (DoS) situation by exploiting IP SLA packets.
A weakness in how Cisco IOS Software and Cisco IOS XE software handle IP Service Level Agreement (SLA) packets could lead to a denial of service (DoS) situation. This vulnerability allows a remote attacker to cause an interface to become unresponsive by sending manipulated IP SLA packets.
Understanding CVE-2019-1737
This CVE involves a vulnerability in Cisco IOS and IOS XE Software that could be exploited by an unauthenticated remote attacker to trigger a DoS situation.
What is CVE-2019-1737?
The vulnerability arises from improper management of socket resources in the IP SLA responder application code, allowing attackers to disrupt device interfaces.
The Impact of CVE-2019-1737
- Attack Complexity: Low
- Attack Vector: Network
- Availability Impact: High
- Base Score: 8.6 (High Severity)
- Scope: Changed
- No Confidentiality or Integrity Impact
- No Privileges Required
- No User Interaction
Technical Details of CVE-2019-1737
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in Cisco IOS and IOS XE Software allows remote attackers to exploit IP SLA packets, causing an interface to become unresponsive and leading to a DoS condition.
Affected Systems and Versions
Numerous versions of Cisco IOS and IOS XE Software are affected, including versions 3.7.0S to 3.10.0cE.
Exploitation Mechanism
- Attackers send manipulated IP SLA packets to the device
- The exploit causes the interface to become unresponsive, resulting in a DoS situation
Mitigation and Prevention
Protecting systems from CVE-2019-1737 involves taking immediate steps and implementing long-term security practices.
Immediate Steps to Take
- Apply vendor patches and updates promptly
- Monitor network traffic for any suspicious activity
- Implement access control lists to restrict IP SLA packet traffic
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Conduct security audits and assessments periodically
- Educate users and administrators on best security practices
Patching and Updates
- Cisco has released patches to address the vulnerability
- Ensure all affected systems are updated with the latest patches