CVE-2016-1546

MEDIUM

Apache HTTP Server <2.4.17-2.4.18 - DoS

Title source: llm

Description

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.

References (21)

[Patch] http://svn.apache.org/viewvc?view=revision&revision=1733727

[Patch, Vendor Advisory] http://httpd.apache.org/security/vulnerabilities_24.html

[Various Sources] http://www.apache.org/dist/httpd/CHANGES_2.4

[Vendor Advisory] http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html

[Vendor Advisory] http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html

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

[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

[Vendor Advisory] https://security.netapp.com/advisory/ntap-20180601-0001/

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/92331

[Third Party Advisory] https://security.gentoo.org/glsa/201610-02

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

[Mailing List] https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%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/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%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/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E

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

... and 1 more

Scores

CVSS v3 5.9

EPSS 0.4188

EPSS Percentile 97.4%

Attack Vector NETWORK

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

Classification

CWE

CWE-399

Status draft

Affected Products (2)

apache/http_server

apache/http_server

Timeline

Published Jul 06, 2016

Tracked Since Feb 18, 2026