Cisco IOS XE 16.6.1/16.6.2 Cisco Discovery Protocol CDP Packet resource consumption

CVSS Meta Temp Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco IOS XE 16.6.1/16.6.2. This affects an unknown part of the component Cisco Discovery Protocol Handler. Performing a manipulation as part of CDP Packet results in resource consumption. This vulnerability was named CVE-2018-0471. The attack needs to be approached within the local network. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS XE 16.6.1/16.6.2 (Router Operating System). It has been classified as problematic. This affects an unknown code of the component Cisco Discovery Protocol Handler. The manipulation as part of a CDP Packet leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the Cisco Discovery Protocol (CDP) module of Cisco IOS XE Software Releases 16.6.1 and 16.6.2 could allow an unauthenticated, adjacent attacker to cause a memory leak that may lead to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain CDP packets. An attacker could exploit this vulnerability by sending certain CDP packets to an affected device. A successful exploit could cause an affected device to continuously consume memory and eventually result in a memory allocation failure that leads to a crash, triggering a reload of the affected device.

The bug was discovered 09/26/2018. The weakness was presented 10/05/2018 as cisco-sa-20180926-cdp-memleak as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2018-0471 since 11/26/2017. The attack needs to be initiated within the local network. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 117943 (Cisco IOS XE Software CDP Memory Leak DoS Vulnerability (cisco-sa-20180926-cdp-memleak)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316324 (Cisco IOS XE Software Cisco Discovery Protocol Memory Leak Vulnerability(cisco-sa-20180926-cdp-memleak)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117943) and SecurityFocus (BID 105398†). See VDB-124867, VDB-124862 and VDB-124861 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117943
Nessus Name: Cisco IOS XE Software CDP Memory Leak DoS Vulnerability (cisco-sa-20180926-cdp-memleak)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/26/2017 🔍
09/26/2018 +303 days 🔍
09/26/2018 +0 days 🔍
09/26/2018 +0 days 🔍
10/05/2018 +8 days 🔍
10/05/2018 +0 days 🔍
10/05/2018 +0 days 🔍
10/06/2018 +1 days 🔍
05/22/2023 +1689 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20180926-cdp-memleak
Status: Confirmed

CVE: CVE-2018-0471 (🔍)
GCVE (CVE): GCVE-0-2018-0471
GCVE (VulDB): GCVE-100-124863

OVAL: 🔍

SecurityFocus: 105398 - Cisco IOS XE Software CVE-2018-0471 Denial of Service Vulnerability
SecurityTracker: 1041737

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 10/06/2018 10:35
Updated: 05/22/2023 13:05
Changes: 10/06/2018 10:35 (74), 03/30/2020 11:27 (4), 05/22/2023 13:05 (4)
Complete: 🔍
Cache ID: 216::103

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