Apache HTTP Server 2.4.17/2.4.18 mod_http2 resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

A vulnerability was found in Apache HTTP Server 2.4.17/2.4.18 (Web Server). It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component mod_http2. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.

The weakness was disclosed 07/06/2016 (Website). It is possible to read the advisory at httpd.apache.org. This vulnerability is known as CVE-2016-1546 since 01/07/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 93903 (GLSA-201610-02 : Apache: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86488 (Apache HTTP Server Prior to 2.4.20 Thread Starvation Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (93903) and SecurityFocus (BID 92331†). The entries VDB-6090, VDB-6092, VDB-9602 and VDB-67180 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 93903
Nessus Name: GLSA-201610-02 : Apache: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864219
OpenVAS Name: Apache HTTP Server Denial of Service Vulnerability - Jul16
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

01/07/2016 🔍
04/11/2016 +95 days 🔍
07/06/2016 +86 days 🔍
07/06/2016 +0 days 🔍
07/07/2016 +1 days 🔍
10/06/2016 +91 days 🔍
10/07/2016 +1 days 🔍
10/14/2024 +2929 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: RHSA-2017:1161
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-1546 (🔍)
SecurityFocus: 92331 - Apache HTTP Server CVE-2016-1546 Remote Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/07/2016 10:42 AM
Updated: 10/14/2024 04:02 AM
Changes: 07/07/2016 10:42 AM (64), 02/17/2019 11:07 AM (13), 09/01/2022 06:32 AM (3), 10/14/2024 04:02 AM (16)
Complete: 🔍
Cache ID: 18:836:40

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