VDB-121107 · CVE-2018-8304 · BID 104617

Microsoft Windows up to Server 2016 DNSAPI DNSAPI.dll data processing

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Microsoft Windows (Operating System). This affects an unknown function in the library DNSAPI.dll of the component DNSAPI. The manipulation with an unknown input leads to a data processing vulnerability. CWE is classifying the issue as CWE-19. This is going to have an impact on availability.

The bug was discovered 07/10/2018. The weakness was disclosed 07/10/2018 by Nick Freeman as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is uniquely identified as CVE-2018-8304 since 03/14/2018. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/05/2023). The advisory points out:

A denial of service vulnerability exists in Windows Domain Name System (DNS) DNSAPI.dll when it fails to properly handle DNS responses. An attacker who successfully exploited the vulnerability could cause a system to stop responding. Note that the denial of service condition would not allow an attacker to execute code or to elevate user privileges. However, the denial of service condition could prevent authorized users from using system resources.

The vulnerability scanner Nessus provides a plugin with the ID 110981 (KB4338824: Windows 8.1 and Windows Server 2012 R2 July 2018 Security Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91456 (Microsoft Windows Security Update July 2018).

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 Tenable (110981). The entries 121068, 121076, 121077 and 121079 are pretty similar.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 5.9
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.9
NVD Vector: 🔍



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

NVD Base Score: 🔍


Class: Data processing
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 110981
Nessus Name: KB4338824: Windows 8.1 and Windows Server 2012 R2 July 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍


03/14/2018 🔍
07/10/2018 +117 days 🔍
07/10/2018 +0 days 🔍
07/10/2018 +0 days 🔍
07/10/2018 +0 days 🔍
07/10/2018 +0 days 🔍
07/10/2018 +0 days 🔍
07/11/2018 +1 days 🔍
04/05/2023 +1729 days 🔍


Vendor: microsoft.com
Product: microsoft.com

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

CVE: CVE-2018-8304 (🔍)

SecurityTracker: 1041262
SecurityFocus: 104617 - Microsoft Windows DNSAPI CVE-2018-8304 Remote Denial of Service Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍


Created: 07/11/2018 10:34 AM
Updated: 04/05/2023 04:58 PM
Changes: 07/11/2018 10:34 AM (87), 03/16/2020 04:40 PM (6), 04/05/2023 04:58 PM (5)
Complete: 🔍


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