What is CVE-2020-3259?

CVE-2020-3259 is a high-severity vulnerability affecting the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. This vulnerability could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, potentially leading to the disclosure of confidential information. Systems running specific AnyConnect and WebVPN configurations on Cisco ASA and FTD software are at risk.

Who is impacted by this?

The CVE-2020-3259 vulnerability affects users of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software with specific AnyConnect and WebVPN configurations. The impacted versions include Cisco FTD Software 6.2.3 up to 6.2.3.16, 6.3.0 up to 6.3.0.6, 6.4.0 up to 6.4.0.9, and 6.5.0 up to 6.5.0.5, as well as Cisco ASA Software 9.8 up to 9.8.4.20, 9.9 up to 9.9.2.67, 9.10 up to 9.10.1.40, 9.12 up to 9.12.3.9, and 9.13 up to 9.13.1.10

What to do if CVE-2020-3259 affected you

If you're affected by the CVE-2020-3259 vulnerability, it's crucial to take action to protect your system. Follow these simple steps to mitigate the risk:

1. Identify if your system is running the affected Cisco ASA or FTD software versions.

2. Consult Cisco's security advisories for patches and updates.

3. Apply the recommended patches or updates promptly.

4. Monitor your system for any signs of unauthorized access or data breaches.

By taking these steps, you can help safeguard your system against potential attacks and protect your confidential information.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2020-3259 vulnerability, also known as Cisco ASA and FTD Information Disclosure Vulnerability, is indeed listed in CISA's Known Exploited Vulnerabilities Catalog. It was added on February 15, 2024, and the due date for required action is March 7, 2024. Organizations affected by this vulnerability should apply mitigations as per vendor instructions or discontinue using the product if mitigations are unavailable.

Weakness Enumeration

The weakness enumeration for this vulnerability is categorized as CWE-200, which involves exposure of sensitive information to an unauthorized actor.

Learn More

For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD page or the sources listed below.

• Cisco Security Advisory

• BOD 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities | CISA

• Known Exploited Vulnerabilities Catalog