National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2016-8740 Detail

Current Description

The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3.0 legend)
Impact Score: 3.6
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/140023/Apache-HTTPD-Web-Server-2.4.23-Memory-Exhaustion.html Exploit Third Party Advisory VDB Entry
http://rhn.redhat.com/errata/RHSA-2017-1415.html
http://www.securityfocus.com/bid/94650 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037388 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1161
https://access.redhat.com/errata/RHSA-2017:1413
https://access.redhat.com/errata/RHSA-2017:1414
https://github.com/apache/httpd/commit/29c63b786ae028d82405421585e91283c8fa0da3 Issue Tracking Patch Third Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
https://security.gentoo.org/glsa/201701-36
https://security.netapp.com/advisory/ntap-20180423-0001/
https://support.apple.com/HT208221
https://www.exploit-db.com/exploits/40909/ Exploit Third Party Advisory VDB Entry
https://www.tenable.com/security/tns-2017-04

Technical Details

Vulnerability Type (View All)

  • Improper Input Validation (CWE-20)
  • Resource Management Errors (CWE-399)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.19:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.21:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.22:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

12 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-8740
NVD Published Date:
12/05/2016
NVD Last Modified:
04/24/2018