Synology Router Manager up to 1.1.7 info.cgi host cross site scripting

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 (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Synology Router Manager up to 1.1.7. Affected is an unknown function of the file info.cgi. Performing a manipulation of the argument host as part of Parameter results in cross site scripting. This vulnerability is identified as CVE-2018-8918. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Synology Router Manager up to 1.1.7 (Router Operating System). It has been classified as problematic. This affects an unknown code of the file info.cgi. The manipulation of the argument host as part of a Parameter leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in info.cgi in Synology Router Manager (SRM) before 1.1.7-6941 allows remote attackers to inject arbitrary web script or HTML via the host parameter.

The bug was discovered 05/23/2018. The weakness was released 12/24/2018 (Website). It is possible to read the advisory at synology.com. This vulnerability is uniquely identified as CVE-2018-8918 since 03/22/2018. It is possible to initiate the attack remotely. A authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 215 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.1.7-6941 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Synology Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: 🔍

Upgrade: Router Manager 1.1.7-6941

Timelineinfo

03/22/2018 🔍
05/23/2018 +62 days 🔍
12/24/2018 +215 days 🔍
12/24/2018 +0 days 🔍
12/25/2018 +1 days 🔍
06/20/2023 +1638 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_18_25
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8918 (🔍)
GCVE (CVE): GCVE-0-2018-8918
GCVE (VulDB): GCVE-100-128391

Entryinfo

Created: 12/25/2018 10:25
Updated: 06/20/2023 20:35
Changes: 12/25/2018 10:25 (61), 04/24/2020 09:31 (2), 06/20/2023 20:28 (4), 06/20/2023 20:35 (12)
Complete: 🔍
Cache ID: 216::103

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