CVE-2016-8740

HIGH

Apache HTTP Server 2.4.17-2.4.23 - DoS

Title source: llm

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.

Exploits (3)

exploitdb WORKING POC

by Jungun Baek · pythondoslinux

https://www.exploit-db.com/exploits/40909

View Code ZIP pw:eip

nomisec WORKING POC 1 stars

by jptr218 · poc

https://github.com/jptr218/apachedos

View Code ZIP pw:eip

nomisec WORKING POC 1 stars

by lcfpadilha · poc

https://github.com/lcfpadilha/mac0352-ep4

View Code ZIP pw:eip

References (28)

[Issue Tracking, Patch, Third Party Advisory] https://github.com/apache/httpd/commit/29c63b786ae028d82405421585e91283c8fa0da3

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1037388

[Exploit, Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/140023/Apache-HTTPD-Web-Server-2.4.23-Memory-Exhaustion.html

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2017:1413

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2017:1161

[Third Party Advisory] https://www.tenable.com/security/tns-2017-04

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2017:1414

[Vendor Advisory] https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us

[Vendor Advisory] http://rhn.redhat.com/errata/RHSA-2017-1415.html

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/94650

[Third Party Advisory] https://security.gentoo.org/glsa/201701-36

[Vendor Advisory] https://security.netapp.com/advisory/ntap-20180423-0001/

[Mailing List] https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E

... and 8 more

Scores

CVSS v3 7.5

EPSS 0.6826

EPSS Percentile 98.6%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-399 CWE-20

Status published

Products (8)

apache/http_server 2.4.17

apache/http_server 2.4.18

apache/http_server 2.4.19

apache/http_server 2.4.20

apache/http_server 2.4.21

apache/http_server 2.4.22

apache/http_server 2.4.23

Apache Software Foundation/Apache HTTP Server 2.4.17 - 2.4.23

Published Dec 05, 2016

Tracked Since Feb 18, 2026