Detections
Analytics

Cisco Nexus TCP Packet TIME_WAIT State Handling DoS (cisco-sa-20160302-netstack)

high Nessus Plugin ID 89784

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The remote Cisco Nexus device is affected by a denial of service vulnerability due to improper processing of certain TCP packets in the closing sequence of a TCP session while the affected device is in a TIME_WAIT state. An unauthenticated, remote attacker can exploit this vulnerability, by sending a crafted sequence of TCP packets when the device is in a TIME_WAIT state, to cause a reload of the TCP stack, resulting in a denial of service condition.

Solution

Upgrade to the relevant fixed version referenced in the Cisco bug ID for your model.

See Also

http://www.nessus.org/u?378ab6f5

Plugin Details

Severity: High

ID: 89784

File Name: cisco-sa-20160302-netstack-nxos.nasl

Version: 1.8

Type: combined

Family: CISCO

Published: 3/9/2016

Updated: 10/29/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/2/2016

Vulnerability Publication Date: 3/2/2016

Reference Information

CVE: CVE-2015-0718

BID: 83950