Microsoft Windows Server 2012/Server 2016 Active Directory Federation Services /adfs/ls txtBoxEmail server-side request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$25k-$100k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft Windows Server 2012/Server 2016. Impacted is an unknown function of the file /adfs/ls of the component Active Directory Federation Services. The manipulation of the argument txtBoxEmail leads to server-side request forgery. This vulnerability is uniquely identified as CVE-2018-16794. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Microsoft Windows Server 2012/Server 2016 (Operating System). It has been rated as critical. This issue affects some unknown functionality of the file /adfs/ls of the component Active Directory Federation Services. The manipulation of the argument txtBoxEmail with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Microsoft ADFS 4.0 Windows Server 2016 and previous (Active Directory Federation Services) has an SSRF vulnerability via the txtBoxEmail parameter in /adfs/ls.

The bug was discovered 09/12/2018. The weakness was disclosed 09/18/2018 with Biznet Bilisim A.S. as not defined mailinglist post (Bugtraq). The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2018-16794 since 09/10/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 05/17/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13300 (Microsoft Active Directory Federation Services (ADFS) Server Side Request Forgery Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105378†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.9

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

NVD Base Score: 8.6
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: Server-side request forgery
CWE: CWE-918
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/10/2018 🔍
09/12/2018 +2 days 🔍
09/12/2018 +0 days 🔍
09/18/2018 +5 days 🔍
09/18/2018 +0 days 🔍
09/19/2018 +1 days 🔍
05/17/2023 +1701 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: 149376
Organization: Biznet Bilisim A.S.
Status: Not defined

CVE: CVE-2018-16794 (🔍)
GCVE (CVE): GCVE-0-2018-16794
GCVE (VulDB): GCVE-100-124217
SecurityFocus: 105378 - Microsoft ADFS CVE-2018-16794 Server Side Request Forgery Security Bypass Vulnerability

Entryinfo

Created: 09/19/2018 07:01
Updated: 05/17/2023 08:14
Changes: 09/19/2018 07:01 (64), 03/25/2020 08:16 (4), 05/17/2023 08:14 (3)
Complete: 🔍
Cache ID: 216::103

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

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