Microsoft Windows up to Server 2019 HTTP/2 HTTP.sys resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Windows up to Server 2019. The impacted element is an unknown function in the library HTTP.sys of the component HTTP2 Handler. Performing a manipulation results in resource consumption. This vulnerability is identified as CVE-2019-9514. The attack can be initiated remotely. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows up to Server 2019 (Operating System). This affects some unknown processing in the library HTTP.sys of the component HTTP2 Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability.

The weakness was released 08/13/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2019-9514 since 03/01/2019. 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 attack technique deployed by this issue is T1499 according to MITRE ATT&CK. The advisory points out:

A denial of service vulnerability exists in the HTTP/2 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP/2 requests. An attacker who successfully exploited the vulnerability could create a denial of service condition, causing the target system to become unresponsive.

The vulnerability scanner Nessus provides a plugin with the ID 236549 (Alibaba Cloud Linux 3 : 0013: container-tools:rhel8 (ALINUX3-SA-2021:0013)), which helps to determine the existence of the flaw in a target environment.

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 databases at Tenable (236549) and CERT Bund (WID-SEC-2022-0770). Entries connected to this vulnerability are available at VDB-139968, VDB-139969, VDB-139970 and VDB-139972. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • IBM DB2
  • Red Hat Enterprise Linux
  • IBM SPSS
  • EMC Avamar
  • Hitachi Ops Center

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (CERT/CC): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
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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Nessus ID: 236549
Nessus Name: Alibaba Cloud Linux 3 : 0013: container-tools:rhel8 (ALINUX3-SA-2021:0013)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

03/01/2019 🔍
08/13/2019 +165 days 🔍
08/13/2019 +0 days 🔍
08/14/2019 +1 days 🔍
01/12/2026 +2343 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: RHSA-2019:2594
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2019-9514 (🔍)
GCVE (CVE): GCVE-0-2019-9514
GCVE (VulDB): GCVE-100-139971
CERT Bund: WID-SEC-2022-0770 - IBM DB2: Mehrere Schwachstellen

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

Entryinfo

Created: 08/14/2019 13:51
Updated: 01/12/2026 02:04
Changes: 08/14/2019 13:51 (71), 07/27/2020 12:29 (2), 11/23/2023 18:12 (5), 11/23/2023 18:21 (10), 01/15/2025 05:57 (15), 05/21/2025 22:16 (2), 01/12/2026 02:04 (7)
Complete: 🔍
Cache ID: 216::103

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