CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
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6.2 | $0-$5k | 0.00 |
A vulnerability has been found in Cisco IOS and IOS XE (Router Operating System) (version now known) and classified as problematic. Affected by this vulnerability is some unknown processing of the component IKEv2. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to how an affected device processes certain IKEv2 packets. An attacker could exploit this vulnerability by sending specific IKEv2 packets to an affected device to be processed. A successful exploit could allow the attacker to cause high CPU utilization, traceback messages, or a reload of the affected device that leads to a DoS condition. This vulnerability affects Cisco devices that have the Internet Security Association and Key Management Protocol (ISAKMP) enabled. Although only IKEv2 packets can be used to trigger this vulnerability, devices that are running Cisco IOS Software or Cisco IOS XE Software are vulnerable when ISAKMP is enabled. A device does not need to be configured with any IKEv2-specific features to be vulnerable. Many features use IKEv2, including different types of VPNs such as the following: LAN-to-LAN VPN; Remote-access VPN, excluding SSL VPN; Dynamic Multipoint VPN (DMVPN); and FlexVPN. Cisco Bug IDs: CSCvc41277.
The bug was discovered 09/27/2017. The weakness was shared 09/29/2017 with Cisco (Website). It is possible to read the advisory at securitytracker.com. This vulnerability is known as CVE-2017-12237 since 08/03/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/14/2021).
The vulnerability scanner Nessus provides a plugin with the ID 103693 (Cisco IOS Software Internet Key Exchange Denial of Service Vulnerability), 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 c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316152 (Cisco IOS and IOS XE Software Internet Key Exchange Denial of Service Vulnerability (cisco-sa-20170927-ike)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/03/2022 with a due date of 03/24/2022:
Apply updates per vendor instructions.
Proper firewalling of is able to address this issue. A possible mitigation has been published even before and not after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (103693). The entry 107242 is related to this item.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 6.4VulDB Meta Temp Score: 6.3
VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
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Exploiting
Class: Resource managementCWE: CWE-399 / CWE-404
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
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Nessus ID: 103693
Nessus Name: Cisco IOS Software Internet Key Exchange Denial of Service Vulnerability
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: FirewallStatus: 🔍
0-Day Time: 🔍
Timeline
08/03/2017 🔍09/27/2017 🔍
09/27/2017 🔍
09/27/2017 🔍
09/28/2017 🔍
09/29/2017 🔍
09/29/2017 🔍
10/06/2017 🔍
01/14/2021 🔍
Sources
Vendor: cisco.comAdvisory: securitytracker.com⛔
Researcher: Cisco
Organization: Cisco
Status: Not defined
Confirmation: 🔍
CVE: CVE-2017-12237 (🔍)
OVAL: 🔍
SecurityTracker: 1039460
SecurityFocus: 101037 - Cisco IOS and IOS XE Software CVE-2017-12237 Denial of Service Vulnerability
scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍
Entry
Created: 09/29/2017 12:01Updated: 01/14/2021 18:13
Changes: 09/29/2017 12:01 (70), 11/20/2019 13:21 (6), 01/14/2021 18:06 (2), 01/14/2021 18:13 (1)
Complete: 🔍
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