CVE-2017-6765 : What You Need to Know
Learn about CVE-2017-6765, a cross-site scripting (XSS) vulnerability in Cisco Adaptive Security Appliance (ASA) versions 9.1(6.11) and 9.4(1.2) that could allow attackers to execute malicious scripts or access sensitive information. Find mitigation steps and preventive measures here.
Cisco Adaptive Security Appliance (ASA) versions 9.1(6.11) and 9.4(1.2) contain a cross-site scripting (XSS) vulnerability that could allow unauthorized attackers to execute arbitrary script code or access sensitive information.
Understanding CVE-2017-6765
This CVE identifies a security flaw in the web-based management interface of Cisco ASA versions 9.1(6.11) and 9.4(1.2) that could be exploited for XSS attacks.
What is CVE-2017-6765?
The vulnerability in Cisco ASA allows attackers to launch XSS attacks by manipulating user input in the web-based management interface, potentially leading to the execution of malicious scripts or unauthorized access to sensitive data.
The Impact of CVE-2017-6765
The vulnerability, known as WebVPN XSS, poses a risk of executing arbitrary script code within the interface's context or gaining access to confidential information through the user's browser.
Technical Details of CVE-2017-6765
Cisco ASA versions 9.1(6.11) and 9.4(1.2) are affected by this XSS vulnerability.
Vulnerability Description
The flaw arises from inadequate validation of user-supplied input by the web-based management interface, allowing attackers to craft malicious links to exploit the vulnerability.
Affected Systems and Versions
- Product: Cisco Adaptive Security Appliance
- Versions: 9.1(6.11) and 9.4(1.2)
Exploitation Mechanism
- Attackers lure users into clicking on specially crafted links to execute malicious scripts or access sensitive information.
Mitigation and Prevention
Immediate Steps to Take:
- Apply vendor-supplied patches or updates promptly.
- Monitor Cisco's security advisories for any relevant information.
Long-Term Security Practices:
- Regularly update and patch all software and firmware.
- Educate users about phishing attacks and suspicious links.
- Implement network segmentation and access controls.
- Utilize web application firewalls to detect and prevent XSS attacks.
- Conduct regular security assessments and penetration testing.
- Stay informed about emerging threats and vulnerabilities.
- Consider implementing security policies and procedures to mitigate risks.
Patching and Updates
Ensure that the affected Cisco ASA devices are updated with the latest patches to mitigate the XSS vulnerability.