CVE-2017-3807: A vulnerability in Common Internet Filesystem (CIFS) code in the Clientless SSL VPN functionality of Cisco ASA Software, Major Releases 9.0-9.6, could...

Description

A vulnerability in Common Internet Filesystem (CIFS) code in the Clientless SSL VPN functionality of Cisco ASA Software, Major Releases 9.0-9.6, could allow an authenticated, remote attacker to cause a heap overflow. The vulnerability is due to insufficient validation of user supplied input. An attacker could exploit this vulnerability by sending a crafted URL to the affected system. An exploit could allow the remote attacker to cause a reload of the affected system or potentially execute code. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed firewall mode only and in single or multiple context mode. This vulnerability can be triggered by IPv4 or IPv6 traffic. A valid TCP connection is needed to perform the attack. The attacker needs to have valid credentials to log in to the Clientless SSL VPN portal. Vulnerable Cisco ASA Software running on the following products may be affected by this vulnerability: Cisco ASA 5500 Series Adaptive Security Appliances, Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco ASA for Firepower 9300 Series, Cisco ASA for Firepower 4100 Series. Cisco Bug IDs: CSCvc23838.

Metrics

EPSS Probability

14.76%

96.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Adaptive Security Appliance Software	7.0.1
Cisco	Adaptive Security Appliance Software	7.0.1.4
Cisco	Adaptive Security Appliance Software	7.0.2
Cisco	Adaptive Security Appliance Software	7.0.3
Cisco	Adaptive Security Appliance Software	7.0.4
Cisco	Adaptive Security Appliance Software	7.0.4.2
Cisco	Adaptive Security Appliance Software	7.0.5
Cisco	Adaptive Security Appliance Software	7.0.5.12
Cisco	Adaptive Security Appliance Software	7.0.6
Cisco	Adaptive Security Appliance Software	7.0.6.4
Cisco	Adaptive Security Appliance Software	7.0.6.8
Cisco	Adaptive Security Appliance Software	7.0.6.18
Cisco	Adaptive Security Appliance Software	7.0.6.22
Cisco	Adaptive Security Appliance Software	7.0.6.26
Cisco	Adaptive Security Appliance Software	7.0.6.29
Cisco	Adaptive Security Appliance Software	7.0.6.32
Cisco	Adaptive Security Appliance Software	7.0.7
Cisco	Adaptive Security Appliance Software	7.0.7.1
Cisco	Adaptive Security Appliance Software	7.0.7.4
Cisco	Adaptive Security Appliance Software	7.0.7.9
Cisco	Adaptive Security Appliance Software	7.0.7.12
Cisco	Adaptive Security Appliance Software	7.0.8
Cisco	Adaptive Security Appliance Software	7.0.8.2
Cisco	Adaptive Security Appliance Software	7.0.8.8
Cisco	Adaptive Security Appliance Software	7.0.8.12
Cisco	Adaptive Security Appliance Software	7.0.8.13
Cisco	Adaptive Security Appliance Software	7.1.2
Cisco	Adaptive Security Appliance Software	7.1.2.16
Cisco	Adaptive Security Appliance Software	7.1.2.20
Cisco	Adaptive Security Appliance Software	7.1.2.24
Cisco	Adaptive Security Appliance Software	7.1.2.28
Cisco	Adaptive Security Appliance Software	7.1.2.38
Cisco	Adaptive Security Appliance Software	7.1.2.42
Cisco	Adaptive Security Appliance Software	7.1.2.46
Cisco	Adaptive Security Appliance Software	7.1.2.49
Cisco	Adaptive Security Appliance Software	7.1.2.53
Cisco	Adaptive Security Appliance Software	7.1.2.61
Cisco	Adaptive Security Appliance Software	7.1.2.64
Cisco	Adaptive Security Appliance Software	7.1.2.72
Cisco	Adaptive Security Appliance Software	7.1.2.81
Cisco	Adaptive Security Appliance Software	7.2.1
Cisco	Adaptive Security Appliance Software	7.2.1.9
Cisco	Adaptive Security Appliance Software	7.2.1.13
Cisco	Adaptive Security Appliance Software	7.2.1.19
Cisco	Adaptive Security Appliance Software	7.2.1.24
Cisco	Adaptive Security Appliance Software	7.2.2
Cisco	Adaptive Security Appliance Software	7.2.2.6
Cisco	Adaptive Security Appliance Software	7.2.2.10
Cisco	Adaptive Security Appliance Software	7.2.2.14
Cisco	Adaptive Security Appliance Software	7.2.2.18

Showing 50 of 324 affected configurations. See NVD for the full list.

References

Timeline

Published: Feb 9, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-3807?

A vulnerability in Common Internet Filesystem (CIFS) code in the Clientless SSL VPN functionality of Cisco ASA Software, Major Releases 9.0-9.6, could allow an authenticated, remote attacker to cause a heap overflow. The vulnerability is due to insufficient validation of user supplied input. An attacker could exploit this vulnerability by sending a crafted URL to the affected system. An exploit could allow the remote attacker to cause a reload of the affected system or potentially execute code. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed firewall mode only and in single or multiple context mode. This vulnerability can be triggered by IPv4 or IPv6 traffic. A valid TCP connection is needed to perform the attack. The attacker needs to have valid credentials to log in to the Clientless SSL VPN portal. Vulnerable Cisco ASA Software running on the following products may be affected by this vulnerability: Cisco ASA 5500 Series Adaptive Security Appliances, Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco ASA for Firepower 9300 Series, Cisco ASA for Firepower 4100 Series. Cisco Bug IDs: CSCvc23838.

How severe is CVE-2017-3807?

Severity scoring for CVE-2017-3807 is pending analysis. The EPSS model estimates a 14.76% probability of exploitation in the next 30 days.

How do I fix CVE-2017-3807?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.