Cisco NX-OS Software ICMP Version 6 Memory Leak DoS (cisco-sa-fxos-nxos-icmpv6-dos-YD55jVCq)

medium Nessus Plugin ID 148836

Synopsis

The remote device is missing a vendor-supplied security patch

Description

A denial of service (DoS) vulnerability exists in Cisco NX-OS Software due to improper error handling when an IPv6-configured interface receives a specific type of ICMPv6 packet. An unauthenticated, remote attacker can exploit this issue, via a crafted ICMPv6 packet, to cause a slow system memory leak, which over time could lead to a denial of service (DoS) condition.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvv24541, CSCvv96592, CSCvv96593

See Also

http://www.nessus.org/u?8147915b

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv24541

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv96592

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv96593

Plugin Details

Severity: Medium

ID: 148836

File Name: cisco-sa-fxos-nxos-icmpv6-dos-YD55jVCq.nasl

Version: 1.5

Type: combined

Family: CISCO

Published: 4/20/2021

Updated: 4/21/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-1229

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:nx-os

Required KB Items: Host/Cisco/NX-OS/Version, Host/Cisco/NX-OS/Model, Host/Cisco/NX-OS/Device, Host/aci/system/chassis/summary

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2021

Vulnerability Publication Date: 2/24/2021

Reference Information

CVE: CVE-2021-1229