CVE-2019-1752 : Vulnerability Insights and Analysis
Learn about CVE-2019-1752, a vulnerability in Cisco IOS and IOS XE Software that allows remote attackers to cause device reloads, leading to denial of service. Find out affected versions and mitigation steps.
A vulnerability has been identified in the ISDN features of Cisco IOS Software and Cisco IOS XE Software that could potentially lead to a device restart when exploited by an unauthorized remote attacker. This flaw results from the mishandling of certain values in the Q.931 information elements, potentially causing a denial of service (DoS) situation.
Understanding CVE-2019-1752
This CVE pertains to a vulnerability in Cisco IOS and IOS XE Software that could allow an unauthenticated remote attacker to trigger a device reload, leading to a DoS condition.
What is CVE-2019-1752?
The vulnerability in the ISDN functions of Cisco IOS Software and Cisco IOS XE Software allows an attacker to cause a device reload by exploiting specific values in the Q.931 information elements.
The Impact of CVE-2019-1752
If successfully exploited, this vulnerability can result in a denial of service (DoS) condition, causing the affected device to reload.
Technical Details of CVE-2019-1752
This section provides more technical insights into the vulnerability.
Vulnerability Description
The flaw is due to incorrect processing of specific values in the Q.931 information elements, enabling an attacker to trigger a device reload.
Affected Systems and Versions
- Cisco IOS and IOS XE Software versions 3.8.0S to 16.8.1d are affected.
Exploitation Mechanism
To exploit this vulnerability, an attacker needs to call the affected device with specific Q.931 information elements included.
Mitigation and Prevention
Protecting systems from this vulnerability is crucial to maintaining security.
Immediate Steps to Take
- Apply the necessary security patches provided by Cisco.
- Monitor network traffic for any suspicious activity targeting ISDN functions.
Long-Term Security Practices
- Regularly update and patch all software and firmware to mitigate potential vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
Ensure that all affected systems are updated with the latest patches and security fixes to address this vulnerability.