VDB-124894 · CVE-2018-15387 · BID 105509

Cisco SD-WAN Solution Crafted Certificate input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
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8.2$0-$5k0.00

A vulnerability classified as critical was found in Cisco SD-WAN Solution (version unknown). This vulnerability affects an unknown function. The manipulation as part of a Crafted Certificate leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to bypass certificate validation on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by supplying a system image signed with a crafted certificate to an affected device, bypassing the certificate validation. An exploit could allow an attacker to deploy a crafted system image.

The bug was discovered 10/03/2018. The weakness was shared 10/05/2018 as cisco-sa-20181003-sd-wan-bypas as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability was named CVE-2018-15387 since 08/17/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/17/2018 🔍
10/03/2018 +47 days 🔍
10/03/2018 +0 days 🔍
10/05/2018 +1 days 🔍
10/05/2018 +0 days 🔍
10/06/2018 +1 days 🔍
03/30/2020 +541 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20181003-sd-wan-bypas
Status: Confirmed

CVE: CVE-2018-15387 (🔍)
SecurityFocus: 105509 - Cisco SD-WAN CVE-2018-15387 Certificate Validation Security Bypass Vulnerability

Entryinfo

Created: 10/06/2018 11:09
Updated: 03/30/2020 16:14
Changes: 10/06/2018 11:09 (61), 03/30/2020 16:14 (3)
Complete: 🔍

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