VDB-115161 · CVE-2018-0156 · BID 103569

Cisco IOS/IOS XE Smart Install Client Crafted Packet resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco IOS and IOS XE. This affects an unknown part of the component Smart Install Client. Performing a manipulation as part of Crafted Packet results in input validation. This vulnerability is identified as CVE-2018-0156. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability was found in Cisco IOS and IOS XE (Router Operating System) (the affected version is unknown). It has been classified as problematic. This affects an unknown code of the component Smart Install Client. The manipulation as part of a Crafted Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.

The bug was discovered 03/28/2018. The weakness was released 03/28/2018 with Cisco (Website). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2018-0156 since 11/27/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but an exploit is available.

It is declared as attacked. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316235 (Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability(cisco-sa-20180328-smi)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/03/2022 with a due date of 03/17/2022:

Apply updates per vendor instructions.

It is possible to mitigate the weakness by firewalling tcp/4786. Attack attempts may be identified with Snort ID 41725.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 103569†). Entries connected to this vulnerability are available at VDB-115163, VDB-115164 and VDB-115157. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

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Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Snort ID: 41725
Snort Message: SERVER-OTHER Cisco IOS Smart Install protocol version command attempt
Snort Class: 🔍

Timelineinfo

11/27/2017 🔍
03/28/2018 +121 days 🔍
03/28/2018 +0 days 🔍
03/28/2018 +0 days 🔍
03/28/2018 +0 days 🔍
03/29/2018 +1 days 🔍
01/27/2025 +2496 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securityfocus.com⛔
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0156 (🔍)
GCVE (CVE): GCVE-0-2018-0156
GCVE (VulDB): GCVE-100-115161

OVAL: 🔍

SecurityFocus: 103569 - Cisco IOS and IOS XE Software CVE-2018-0156 Denial of Service Vulnerability
SecurityTracker: 1040596

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

Entryinfo

Created: 03/29/2018 09:14
Updated: 01/27/2025 21:51
Changes: 03/29/2018 09:14 (68), 01/17/2020 16:24 (5), 02/06/2021 11:09 (3), 04/23/2024 15:39 (27), 09/09/2024 22:29 (1), 01/27/2025 21:51 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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