Cisco IOS XR < 6.1.1 on ASR 9000 LPTS DoS

high Nessus Plugin ID 91321

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Synopsis

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

Description

The version of Cisco IOS XR running on the remote ASR 9000 device is prior to 6.1.1. It is, therefore, affected by a denial of service vulnerability in the Local Packet Transport Services (LPTS) network stack due to improper handling of flow base entries, in which too many known entries for a protocol can be created, resulting in dropping existing or new sessions. An unauthenticated, remote attacker can exploit this to cause an exhaustion of resources by sending continuous connection attempts to open TCP ports.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCux95576

Plugin Details

Severity: High

ID: 91321

File Name: cisco-sa-20160519-iosxr.nasl

Version: 1.6

Type: combined

Family: CISCO

Published: 5/25/2016

Updated: 4/8/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2016-1407

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:ios_xr

Required KB Items: Host/Cisco/IOS-XR/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/19/2016

Vulnerability Publication Date: 5/19/2016

Reference Information

CVE: CVE-2016-1407

CISCO-SA: cisco-sa-20160519-ios-xr

CISCO-BUG-ID: CSCux95576

Detections

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