CVE-2019-1901 : A vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco N

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.

Published 2019-07-31 18:15:11

Updated 2023-03-03 17:46:35

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: OverflowExecute codeDenial of service

Products affected by CVE-2019-1901

Cisco » Nx-os
Versions from including (>=) 14.0\(1h\) and up to, including, (<=) 14.1\(2g\)
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Nexus 93108tc-ex » Version: N/A
When used together with: Cisco » Nexus 93108tc-fx » Version: N/A
When used together with: Cisco » Nexus 93120tx » Version: N/A
When used together with: Cisco » Nexus 93128tx » Version: N/A
When used together with: Cisco » Nexus 93180lc-ex » Version: N/A
When used together with: Cisco » Nexus 93180yc-ex » Version: N/A
When used together with: Cisco » Nexus 93180yc-fx » Version: N/A
When used together with: Cisco » Nexus 9332pq » Version: N/A
When used together with: Cisco » Nexus 9336c-fx2 » Version: N/A
When used together with: Cisco » Nexus 9336pq » Version: N/A
When used together with: Cisco » Nexus 9348gc-fxp » Version: N/A
When used together with: Cisco » Nexus 9364c » Version: N/A
When used together with: Cisco » Nexus 9372px » Version: N/A
When used together with: Cisco » Nexus 9372px-e » Version: N/A
When used together with: Cisco » Nexus 9372tx » Version: N/A
When used together with: Cisco » Nexus 9372tx-e » Version: N/A
When used together with: Cisco » Nexus 9396px » Version: N/A
When used together with: Cisco » Nexus 9396tx » Version: N/A
When used together with: Cisco » Nexus 9504 » Version: N/A
When used together with: Cisco » Nexus 9508 » Version: N/A
When used together with: Cisco » Nexus 9516 » Version: N/A
Cisco » Nx-os
Versions before (<) 13.2\(7f\)
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Nexus 93108tc-ex » Version: N/A
When used together with: Cisco » Nexus 93108tc-fx » Version: N/A
When used together with: Cisco » Nexus 93120tx » Version: N/A
When used together with: Cisco » Nexus 93128tx » Version: N/A
When used together with: Cisco » Nexus 93180lc-ex » Version: N/A
When used together with: Cisco » Nexus 93180yc-ex » Version: N/A
When used together with: Cisco » Nexus 93180yc-fx » Version: N/A
When used together with: Cisco » Nexus 9332pq » Version: N/A
When used together with: Cisco » Nexus 9336c-fx2 » Version: N/A
When used together with: Cisco » Nexus 9336pq » Version: N/A
When used together with: Cisco » Nexus 9348gc-fxp » Version: N/A
When used together with: Cisco » Nexus 9364c » Version: N/A
When used together with: Cisco » Nexus 9372px » Version: N/A
When used together with: Cisco » Nexus 9372px-e » Version: N/A
When used together with: Cisco » Nexus 9372tx » Version: N/A
When used together with: Cisco » Nexus 9372tx-e » Version: N/A
When used together with: Cisco » Nexus 9396px » Version: N/A
When used together with: Cisco » Nexus 9396tx » Version: N/A
When used together with: Cisco » Nexus 9504 » Version: N/A
When used together with: Cisco » Nexus 9508 » Version: N/A
When used together with: Cisco » Nexus 9516 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2019-1901

EPSS FAQ

0.11%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 43 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-1901

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
8.3	HIGH	AV:A/AC:L/Au:N/C:C/I:C/A:C	6.5	10.0	NIST
Access Vector: Adjacent Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
8.8	HIGH	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	Cisco Systems, Inc.
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
8.8	HIGH	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2019-1901

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

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)

References for CVE-2019-1901

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

Cisco Nexus 9000 Series ACI Mode Switch Software Link Layer Discovery Protocol Buffer Overflow Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2019-1901

Products affected by CVE-2019-1901

Exploit prediction scoring system (EPSS) score for CVE-2019-1901

CVSS scores for CVE-2019-1901

CWE ids for CVE-2019-1901

References for CVE-2019-1901