VDB-98382 · CVE-2017-3864 · BID 97012

Cisco IOS/IOS XE DHCP Client resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Cisco IOS and IOS XE (Router Operating System). Affected is an unknown code of the component DHCP Client. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the DHCP client implementation of Cisco IOS (12.2, 12.4, and 15.0 through 15.6) and Cisco IOS XE (3.3 through 3.7) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability occurs during the parsing of a crafted DHCP packet. An attacker could exploit this vulnerability by sending crafted DHCP packets to an affected device that is configured as a DHCP client. A successful exploit could allow the attacker to cause a reload of an affected device, resulting in a DoS condition. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS or IOS XE Software and using a specific DHCP client configuration. Cisco Bug IDs: CSCuu43892.

The bug was discovered 03/22/2017. The weakness was disclosed 03/22/2017 with Cisco as cisco-sa-20170322-dhcpc as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2017-3864 since 12/21/2016. The attack needs to be initiated within the local network. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/14/2022).

The vulnerability scanner Nessus provides a plugin with the ID 99026 (Cisco IOS DHCP Client DoS (cisco-sa-20170322-dhcpc)), 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.

It is possible to mitigate the weakness by firewalling . A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99026). The entry VDB-98379 is pretty similar.


  • Cisco IOS 12.2/12.4/15.6
  • Cisco IOS XE 3.3/3.4/3.5/3.6/3.7






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Cisco): 8.6
Vendor Vector (Cisco): 🔍

NVD Base Score: 8.6
NVD Vector: 🔍



VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Resource management
CWE: CWE-399 / CWE-404

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 99026
Nessus Name: Cisco IOS DHCP Client DoS (cisco-sa-20170322-dhcpc)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103403
OpenVAS Name: Cisco IOS XE Software DHCP Client Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Firewall
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍


12/21/2016 🔍
03/22/2017 +91 days 🔍
03/22/2017 +0 days 🔍
03/22/2017 +0 days 🔍
03/22/2017 +0 days 🔍
03/22/2017 +0 days 🔍
03/23/2017 +1 days 🔍
03/28/2017 +5 days 🔍
11/14/2022 +2057 days 🔍


Vendor: cisco.com

Advisory: cisco-sa-20170322-dhcpc
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-3864 (🔍)

SecurityTracker: 1038103
SecurityFocus: 97012 - Cisco IOS and IOS XE Software CVE-2017-3864 Denial of Service Vulnerability
OSVDB: - CVE-2017-3864 - Cisco - Multiple Products - Denial of Service Issue

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍


Created: 03/23/2017 07:57 AM
Updated: 11/14/2022 12:25 PM
Changes: 03/23/2017 07:57 AM (84), 08/23/2020 10:59 AM (7), 11/14/2022 12:25 PM (4)
Complete: 🔍
Cache ID: 3:12B:40


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