Is CVE-2018-0101 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 87%.

What products does CVE-2018-0101 affect?

Tracked products affected include Cisco Firepower Threat Defense. Check the version you run to see whether it is affected.

How do I fix CVE-2018-0101?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

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CVE-2018-0101

Q: What is CVE-2018-0101?

CVE-2018-0101 is a critical-severity software vulnerability (Double free) with a CVSS score of 10. A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code

CRITICAL severity · CVSS 10 · Double free

10CVSS CRITICAL

Summary

A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to an attempt to double free a region of memory when the webvpn feature is enabled on the Cisco ASA device. An attacker could exploit this vulnerability by sending multiple, crafted XML packets to a webvpn-configured interface on the affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, or cause a reload of the affected device. This vulnerability affects Cisco ASA Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, ASA 1000V Cloud Firewall, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4110 Security Appliance, Firepower 9300 ASA Security Module, Firepower Threat Defense Software (FTD). Cisco Bug IDs: CSCvg35618.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)87%

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products we track (1)

Cisco Firepower Threat Defense

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

CVE-2018-0101

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information