CVE-2019-1901

8.8

HIGH

"Cisco Nexus 9000 Series Link Layer Discovery Protocol (LLDP) TLV Buffer Overflow"

Description

A vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an adjacent, unauthenticated attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges. The vulnerability is due to improper input validation of certain type, length, value (TLV) fields of the LLDP frame header. An attacker could exploit this vulnerability by sending a crafted LLDP packet to the targeted device. A successful exploit may lead to a buffer overflow condition that could either cause a DoS condition or allow the attacker to execute arbitrary code with root privileges. Note: This vulnerability cannot be exploited by transit traffic through the device; the crafted packet must be targeted to a directly connected interface. This vulnerability affects Cisco Nexus 9000 Series Fabric Switches in ACI mode if they are running a Cisco Nexus 9000 Series ACI Mode Switch Software release prior to 13.2(7f) or any 14.x release.

INFO

Published Date :

July 31, 2019, 6:15 p.m.

Last Modified :

March 3, 2023, 5:46 p.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

2.8

Affected Products

The following products are affected by CVE-2019-1901 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Cisco	nx-os

: Total Affected Vendor : 1 | Products : 1

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-1901.

URL	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190731-nxos-bo	Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-1901 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-1901 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by [email protected]

May. 14, 2024

Action Type Old Value New Value
Modified Analysis by [email protected]

Mar. 03, 2023

Action Type Old Value New Value

Removed CVSS V3 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Added CVSS V3.1 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE Modified by [email protected]

Oct. 09, 2019

Action Type Old Value New Value

Added CVSS V3 Cisco Systems, Inc. AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Added CWE Cisco Systems, Inc. CWE-119

Action	Type	Old Value	New Value
Removed	CVSS V3	NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CVSS V3.1		NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Action	Type	Old Value	New Value
Added	CVSS V3		Cisco Systems, Inc. AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CWE		Cisco Systems, Inc. CWE-119

Initial Analysis by [email protected]

Aug. 12, 2019

Action	Type	Old Value	New Value
Added	CVSS V2		(AV:A/AC:L/Au:N/C:C/I:C/A:C)
Added	CVSS V3		AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190731-nxos-bo No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190731-nxos-bo Vendor Advisory
Added	CWE		CWE-119
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:nx-os::::::::* versions up to (excluding) 13.2\(7f\) cpe:2.3:o:cisco:nx-os::::::::* versions from (including) 14.0(1h) up to (including) 14.1\(2g\) OR cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::* cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::* cpe:2.3:h:cisco:nexus_93120tx:-:::::::* cpe:2.3:h:cisco:nexus_93128tx:-:::::::* cpe:2.3:h:cisco:nexus_93180lc-ex:-:::::::* cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::* cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::* cpe:2.3:h:cisco:nexus_9332pq:-:::::::* cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::* cpe:2.3:h:cisco:nexus_9336pq:-:::::::* cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::* cpe:2.3:h:cisco:nexus_9364c:-:::::::* cpe:2.3:h:cisco:nexus_9372px:-:::::::* cpe:2.3:h:cisco:nexus_9372px-e:-:::::::* cpe:2.3:h:cisco:nexus_9372tx:-:::::::* cpe:2.3:h:cisco:nexus_9372tx-e:-:::::::* cpe:2.3:h:cisco:nexus_9396px:-:::::::* cpe:2.3:h:cisco:nexus_9396tx:-:::::::* cpe:2.3:h:cisco:nexus_9504:-:::::::* cpe:2.3:h:cisco:nexus_9508:-:::::::* cpe:2.3:h:cisco:nexus_9516:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:nx-os::::::::* versions from (including) 14.0\(1h\) up to (including) 14.1\(2g\) OR cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::* cpe:2.3:h:cisco:nexus_9332c:-:::::::*

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-1901 is associated with the following CWEs:

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-1901 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

CVE-2019-1901

"Cisco Nexus 9000 Series Link Layer Discovery Protocol (LLDP) TLV Buffer Overflow"

Description

INFO

July 31, 2019, 6:15 p.m.

March 3, 2023, 5:46 p.m.

[email protected]

No

5.9

2.8

Affected Products

References to Advisories, Solutions, and Tools

CVE Modified by [email protected]

Modified Analysis by [email protected]

CVE Modified by [email protected]

Initial Analysis by [email protected]

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

0.11 }} 0.00%

0.41696

CVSS31 - Vulnerability Scoring System

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