VDB-126793 · CVE-2018-8600 · BID 105893

Microsoft Azure App Service on Azure Stack 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 (≈) 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 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.
4.6	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft Azure App Service on Azure Stack. The impacted element is an unknown function. This manipulation causes cross site scripting. This vulnerability appears as CVE-2018-8600. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft Azure App Service on Azure Stack (Cloud Software) (affected version not known). Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

A Cross-site Scripting (XSS) vulnerability exists when Azure App Services on Azure Stack does not properly sanitize user provided input, aka "Azure App Service Cross-site Scripting Vulnerability." This affects Azure App.

The bug was discovered 11/13/2018. The weakness was presented 11/13/2018 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2018-8600 since 03/14/2018. The attack can be launched remotely. A single authentication is required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. The advisory points out:

A Cross-site Scripting (XSS) vulnerability exists when Azure App Services on Azure Stack does not properly sanitize user provided input. An authenticated attacker could exploit the vulnerability by sending a specially crafted payload to the App Service, which will get executed in the context of the user every time a user visits the compromised page.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105893†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Cloud Software

Vendor

Microsoft

Name

Azure App Service

License

commercial

Website

Vendor: https://www.microsoft.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

03/14/2018 🔍
11/13/2018 +244 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/14/2018 +1 days 🔍
04/12/2020 +515 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8600 (🔍)
GCVE (CVE): GCVE-0-2018-8600
GCVE (VulDB): GCVE-100-126793
SecurityFocus: 105893 - Microsoft Azure App Service CVE-2018-8600 Cross Site Scripting Vulnerability

Entryinfo

Created: 11/14/2018 10:13
Updated: 04/12/2020 16:23
Changes: 11/14/2018 10:13 (63), 04/12/2020 16:23 (4)
Complete: 🔍
Cache ID: 216::103

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