High severity7.5NVD Advisory· Published Dec 5, 2016· Updated May 6, 2026
CVE-2016-8740
CVE-2016-8740
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.
Affected products
8cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.19:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.21:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.22:*:*:*:*:*:*:*
- cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*
- Apache Software Foundation/Apache HTTP Serverv5Range: 2.4.17 - 2.4.23
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
28- github.com/apache/httpd/commit/29c63b786ae028d82405421585e91283c8fa0da3nvdIssue TrackingPatchThird Party Advisory
- packetstormsecurity.com/files/140023/Apache-HTTPD-Web-Server-2.4.23-Memory-Exhaustion.htmlnvdExploitThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/40909/nvdExploitThird Party AdvisoryVDB Entry
- www.securityfocus.com/bid/94650nvdThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1037388nvdThird Party AdvisoryVDB Entry
- rhn.redhat.com/errata/RHSA-2017-1415.htmlnvd
- access.redhat.com/errata/RHSA-2017:1161nvd
- access.redhat.com/errata/RHSA-2017:1413nvd
- access.redhat.com/errata/RHSA-2017:1414nvd
- h20566.www2.hpe.com/hpsc/doc/public/displaynvd
- lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3Envd
- lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3Envd
- security.gentoo.org/glsa/201701-36nvd
- security.netapp.com/advisory/ntap-20180423-0001/nvd
- support.apple.com/HT208221nvd
- www.tenable.com/security/tns-2017-04nvd
News mentions
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