Cisco IOS XR NetFlow and Network Processor (NP) Chip DoS (Typhoon-based Line Cards)

medium Nessus Plugin ID 77729

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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 software that is potentially affected by a denial of service vulnerability related the handling of a maliciously crafted packet with a multicast destination MAC address routed by a bridge-group virtual interface.

Note that this issue only affects Cisco ASR 9000 series devices using Typhoon-based line cards with a Bridge Virtual Interface (BVI) configured for egress NetFlow collection with a static ARP mapping a unicast IP address to a multicast MAC address.

Solution

Apply the relevant patch referenced in Cisco bug ID CSCup77750.

Plugin Details

Severity: Medium

ID: 77729

File Name: cisco-sn-CSCup77750-iosxr.nasl

Version: 1.11

Type: combined

Family: CISCO

Published: 9/17/2014

Updated: 4/8/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2014-3335

Vulnerability Information

CPE: cpe:/o:cisco:ios_xr, cpe:/h:cisco:asr

Required KB Items: Settings/ParanoidReport, Host/Cisco/IOS-XR/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2014

Vulnerability Publication Date: 8/25/2014

Reference Information

CVE: CVE-2014-3335

BID: 69383

CISCO-BUG-ID: CSCup77750

Detections

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