Cisco NX-OS up to 7.2 IPv4 DHCP Packet resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco NX-OS up to 7.2. The impacted element is an unknown function of the component IPv4 DHCP Packet Handler. The manipulation leads to resource management. This vulnerability is traded as CVE-2015-6392. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco NX-OS up to 7.2 (Router Operating System). It has been rated as critical. This issue affects an unknown functionality of the component IPv4 DHCP Packet Handler. 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:

Cisco NX-OS 4.1 through 7.2 on Nexus 2000, 5000, 5500, 5600, 6000, 7000, 7700, and 9000 devices allows remote attackers to cause a denial of service (device crash) via crafted IPv4 DHCP packets to the (1) DHCPv4 relay agent or (2) smart relay agent, aka Bug IDs CSCuq24603, CSCur93159, CSCus21693, and CSCut76171.

The weakness was shared 10/06/2016 with Cisco as CSCuq24603 / CSCur93159 / CSCus21693 / CSCut76171 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2015-6392 since 08/17/2015. The exploitation is known to be easy. 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 scanner Nessus provides a plugin with the ID 95256 (Cisco NX-OS DHCPv4 Crafted Packet DoS (cisco-sa-20161005-dhcp1)), 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 316056 (Cisco NX-OS Software Crafted DHCPv4 Packet Denial of Service Vulnerability (cisco-sa-20161005-dhcp1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95256), SecurityFocus (BID 93406†) and SecurityTracker (ID 1036948†). The entry VDB-92430 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95256
Nessus Name: Cisco NX-OS DHCPv4 Crafted Packet DoS (cisco-sa-20161005-dhcp1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703552
OpenVAS Name: Cisco NX-OS Software Crafted DHCPv4 Packet Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Timelineinfo

08/17/2015 🔍
10/05/2016 +415 days 🔍
10/05/2016 +0 days 🔍
10/05/2016 +0 days 🔍
10/06/2016 +1 days 🔍
10/06/2016 +0 days 🔍
10/06/2016 +0 days 🔍
11/22/2016 +47 days 🔍
09/22/2022 +2130 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCuq24603 / CSCur93159 / CSCus21693 / CSCut76171
Organization: Cisco
Status: Confirmed

CVE: CVE-2015-6392 (🔍)
GCVE (CVE): GCVE-0-2015-6392
GCVE (VulDB): GCVE-100-92429
SecurityFocus: 93406 - Multiple Cisco Nexus Devices CVE-2015-6392 Denial of Service Vulnerability
SecurityTracker: 1036948

See also: 🔍

Entryinfo

Created: 10/06/2016 09:31
Updated: 09/22/2022 12:06
Changes: 10/06/2016 09:31 (56), 05/04/2019 06:23 (18), 09/22/2022 12:06 (11)
Complete: 🔍
Cache ID: 216::103

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