Cisco ASA/Firepower Threat Defense Application Layer Protocol Inspection resource management
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CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
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6.8 | $0-$5k | 0.00 |
A vulnerability was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (affected version unknown). It has been rated as problematic. This issue affects an unknown functionality of the component Application Layer Protocol Inspection. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:
Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerabilities are due to logical errors during traffic inspection. An attacker could exploit these vulnerabilities by sending a high volume of malicious traffic across an affected device. An exploit could allow the attacker to cause a deadlock condition, resulting in a reload of an affected device. These vulnerabilities affect Cisco ASA Software and Cisco FTD Software configured for Application Layer Protocol Inspection 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, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCve61540, CSCvh23085, CSCvh95456.
The bug was discovered 04/18/2018. The weakness was presented 04/19/2018 as cisco-sa-20180418-asa_inspect as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2018-0240 since 11/27/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.
The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 109404 (Cisco ASA Multiple Vulnerabilities (cisco-sa-20180418-asa1 / cisco-sa-20180418-asa2 / cisco-sa-20180418-asa3 / cisco-sa-20180418-asaanyconnect / cisco-sa-20180418-asa_inspect)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316241 (Cisco Adaptive Security Appliance Application Layer Protocol Inspection Denial of Service Vulnerabilities(cisco-sa-20180418-asa_inspect)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at Tenable (109404) and SecurityFocus (BID 103934†).
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
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CVSSv3
VulDB Meta Base Score: 6.9VulDB Meta Temp Score: 6.8
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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NVD Base Score: 8.6
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CVSSv2
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Exploiting
Class: Resource managementCWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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Nessus ID: 109404
Nessus Name: Cisco ASA Multiple Vulnerabilities (cisco-sa-20180418-asa1 / cisco-sa-20180418-asa2 / cisco-sa-20180418-asa3 / cisco-sa-20180418-asaanyconnect / cisco-sa-20180418-asa_inspect)
Nessus File: 🔍
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Qualys ID: 🔍
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
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Timeline
11/27/2017 🔍04/18/2018 🔍
04/18/2018 🔍
04/19/2018 🔍
04/19/2018 🔍
04/21/2018 🔍
04/27/2018 🔍
04/27/2018 🔍
03/03/2023 🔍
Sources
Vendor: cisco.comAdvisory: cisco-sa-20180418-asa_inspect
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2018-0240 (🔍)
SecurityFocus: 103934 - Multiple Cisco Products CVE-2018-0240 Multiple Denial of Service Vulnerabilities
SecurityTracker: 1040722
Entry
Created: 04/21/2018 16:12Updated: 03/03/2023 14:08
Changes: 04/21/2018 16:12 (72), 03/30/2020 16:08 (6), 03/03/2023 14:08 (4)
Complete: 🔍
Cache ID: 18:3C8:103
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