Cisco NX-OS 5.2(5) on Nexus 7000 LLDP Packet input validation

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco NX-OS 5.2(5) on Nexus 7000. It has been rated as problematic. The affected element is an unknown function of the component LLDP Packet Handler. This manipulation causes input validation. This vulnerability is tracked as CVE-2015-4197. The attack is restricted to local execution. No exploit exists. It is advisable to implement restrictive firewalling.

Detailsinfo

A vulnerability has been found in Cisco NX-OS 5.2(5) on Nexus 7000 (Router Operating System) and classified as problematic. Affected by this vulnerability is an unknown function of the component LLDP Packet Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

Cisco NX-OS 5.2(5) on Nexus 7000 devices allows remote attackers to cause a denial of service (device crash) by sending a malformed LLDP packet on the local network, aka Bug ID CSCud89415.

The weakness was disclosed 06/20/2015 with Cisco as CSCud89415 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2015-4197 since 06/04/2015. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 43047 (Cisco NX-OS Link Layer Discovery Protocol Denial of Service Vulnerability (Cisco-SA-20150619-CVE-2015-4197)).

Proper firewalling of is able to address this issue.

The vulnerability is also documented in the databases at X-Force (103962), SecurityFocus (BID 75324†), SecurityTracker (ID 1032675†) and Vulnerability Center (SBV-50668†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103402
OpenVAS Name: Cisco NX-OS Software Link Layer Discovery Protocol Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/04/2015 🔍
06/19/2015 +15 days 🔍
06/20/2015 +1 days 🔍
06/20/2015 +0 days 🔍
06/20/2015 +0 days 🔍
06/20/2015 +0 days 🔍
06/21/2015 +1 days 🔍
06/23/2015 +2 days 🔍
05/17/2018 +1059 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCud89415
Organization: Cisco
Status: Confirmed

CVE: CVE-2015-4197 (🔍)
GCVE (CVE): GCVE-0-2015-4197
GCVE (VulDB): GCVE-100-76027
X-Force: 103962 - Cisco NX-OS LLDP denial of service
SecurityFocus: 75324 - Cisco NX-OS Software for Nexus 7000 Series CVE-2015-4197 Denial of Service Vulnerability
SecurityTracker: 1032675 - Cisco NX-OS LLDP Processing Flaw Lets Remote Users Deny Service
Vulnerability Center: 50668 - Cisco NX-OS on Nexus 7000 Remote DoS by Sending a Malformed LLDP Packet, Medium

Entryinfo

Created: 06/21/2015 14:36
Updated: 05/17/2018 23:24
Changes: 06/21/2015 14:36 (69), 05/17/2018 23:24 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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