CVE-2019-12693 : Security Advisory and Response
Learn about CVE-2019-12693, a vulnerability in Cisco ASA Software's Secure Copy feature that can lead to a denial of service condition. Find out the impact, affected systems, exploitation details, and mitigation steps.
Cisco Adaptive Security Appliance Software Secure Copy Denial of Service Vulnerability
Understanding CVE-2019-12693
This CVE involves a security issue with the Secure Copy (SCP) functionality in Cisco Adaptive Security Appliance (ASA) Software, potentially leading to a denial of service (DoS) situation.
What is CVE-2019-12693?
The vulnerability in the SCP feature of Cisco ASA Software allows an authenticated remote attacker to trigger a DoS condition by exploiting an incorrect data type for a length variable.
The Impact of CVE-2019-12693
- CVSS Base Score: 6.8 (Medium Severity)
- Attack Vector: Network
- Availability Impact: High
- Successful exploitation can result in a crash of the affected device.
Technical Details of CVE-2019-12693
The following technical details provide insight into the vulnerability:
Vulnerability Description
- The vulnerability stems from the misuse of a specific length variable data type.
- Exploitation requires valid privilege level 15 credentials on the affected device.
Affected Systems and Versions
- Affected Product: Cisco Adaptive Security Appliance (ASA) Software
- Affected Version: Unspecified
Exploitation Mechanism
- Attacker needs to initiate a large file transfer via SCP with valid privilege level 15 credentials to trigger the vulnerability.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2019-12693.
Immediate Steps to Take
- Monitor vendor updates and apply patches promptly.
- Restrict network access to authorized personnel only.
- Implement strong password policies and multi-factor authentication.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security training for employees to raise awareness of social engineering tactics.
- Employ network segmentation to limit the impact of potential breaches.
Patching and Updates
- Stay informed about security advisories from Cisco.
- Apply recommended patches and updates to the affected systems in a timely manner.