Cisco IOS XR 5.1.x < 5.1.3 / 5.2.x < 5.2.4 / 5.3.x < 5.3.2 Fragmented Packet DoS (cisco-sa-20160810-iosxr)

high Nessus Plugin ID 93048

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Synopsis

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

Description

The remote Cisco device is running a version of Cisco IOS XR that is 5.1.x prior to 5.1.3, 5.2.x prior to 5.2.4, or 5.3.x prior to 5.3.2.
It is, therefore, affected by a denial of service vulnerability in the driver processing functions due to improper processing of fragmented packets. An unauthenticated, remote attacker can exploit this to cause a memory leak on the route processor (RP), resulting in the device dropping all control-plane protocols.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCux26791.

Plugin Details

Severity: High

ID: 93048

File Name: cisco-sa-20160810-iosxr.nasl

Version: 1.8

Type: combined

Family: CISCO

Published: 8/19/2016

Updated: 4/8/2021

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 Score Source: CVE-2016-6355

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, CISCO/model

Exploit Ease: No known exploits are available

Patch Publication Date: 8/10/2016

Vulnerability Publication Date: 8/10/2016

Reference Information

CVE: CVE-2016-6355

BID: 92399

CISCO-SA: cisco-sa-20160810-iosxr

CISCO-BUG-ID: CSCux26791

Detections

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