SB2019080103 - Buffer overflow in Cisco Nexus 9000 Series ACI Mode Switch Software

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Main Vulnerability Database SB2019080103

SB2019080103 - Buffer overflow in Cisco Nexus 9000 Series ACI Mode Switch Software

Published: August 1, 2019

Security Bulletin ID SB2019080103
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Buffer overflow (CVE-ID: CVE-2019-1901)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows an attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges.

The vulnerability exists due to improper input validation of certain type, length, value (TLV) fields of the Link Layer Discovery Protocol (LLDP) frame header. An attacker can send a specially crafted LLDP packet to the targeted device, trigger memory corruption and cause a DoS condition or execute arbitrary code with root privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: This vulnerability cannot be exploited by transit traffic through the device; the crafted packet must be targeted to a directly connected interface.


Remediation

Install update from vendor's website.

References