NVD Vulnerability Detail

CVE-2016-1546

Summary	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.
Publication Date	July 6, 2016, 11:59 p.m.
Registration Date	Jan. 26, 2021, 2:07 p.m.
Last Update	Nov. 21, 2024, 11:46 a.m.

CVSS3.0 : MEDIUM
スコア	5.9
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	高
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	4.3
Vector	AV:N/AC:M/Au:N/C:N/I:N/A:P
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	中
攻撃前の認証要否(Au)	不要
機密性への影響(C)	なし
完全性への影響(I)	なし
可用性への影響(A)	低
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	いいえ

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:apache:http_server:2.4.18:::::::*
cpe:2.3:a:apache:http_server:2.4.17:::::::*

Related information, measures and tools

No	URL	タグ
1	http://httpd.apache.org/security/vulnerabilities_24.html	Patch Vendor Advisory
2	http://httpd.apache.org/security/vulnerabilities_24.html	Patch Vendor Advisory
3	http://svn.apache.org/viewvc?view=revision&revision=1733727
4	http://svn.apache.org/viewvc?view=revision&revision=1733727
5	http://www.apache.org/dist/httpd/CHANGES_2.4
6	http://www.apache.org/dist/httpd/CHANGES_2.4
7	http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
8	http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
9	http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html
10	http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html
11	http://www.securityfocus.com/bid/92331
12	http://www.securityfocus.com/bid/92331
13	https://access.redhat.com/errata/RHSA-2017:1161
14	https://access.redhat.com/errata/RHSA-2017:1161
15	https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
16	https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
17	https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
18	https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
19	https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E
20	https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E
21	https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E
22	https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E
23	https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
24	https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
25	https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E
26	https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E
27	https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
28	https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
29	https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E
30	https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E
31	https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
32	https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
33	https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E
34	https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E
35	https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
36	https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
37	https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
38	https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
39	https://security.gentoo.org/glsa/201610-02
40	https://security.gentoo.org/glsa/201610-02
41	https://security.netapp.com/advisory/ntap-20180601-0001/
42	https://security.netapp.com/advisory/ntap-20180601-0001/

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-399	リソース管理の問題	https://cwe.mitre.org/data/definitions/399.html

JVN Vulnerability Information

Apache HTTP Server におけるサービス運用妨害 (DoS) の脆弱性

Title	Apache HTTP Server におけるサービス運用妨害 (DoS) の脆弱性
Summary	Apache HTTP Server は、mod_http2 が有効な場合、単一の HTTP/2 接続に対して同時ストリームのワーカー数を制限しないため、サービス運用妨害 (ストリーム処理の停止) 状態にされる脆弱性が存在します。
Possible impacts	第三者により、変更されたフロー制御ウィンドウを介して、サービス運用妨害 (ストリーム処理の停止) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	April 11, 2016, midnight
Registration Date	July 11, 2016, 6:07 p.m.
Last Update	Dec. 5, 2016, 4:57 p.m.

Affected System

Apache Software Foundation

Apache HTTP Server 2.4.17

Apache HTTP Server 2.4.18

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2016-1546	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1546
National Vulnerability Database (NVD)
2	CVE-2016-1546	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-1546

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-399	https://jvndb.jvn.jp/ja/cwe/CWE-399.html

ベンダー情報

No	Name	URL
Apache httpd 2.4 vulnerabilities
1	Fixed in Apache httpd 2.4.20	http://httpd.apache.org/security/vulnerabilities_24.html#2.4.20
Apache-SVN
2	Revision 1733727	http://svn.apache.org/viewvc?view=revision&revision=1733727
Changes with Apache
3	Apache 2.4.20	http://www.apache.org/dist/httpd/CHANGES_2.4
Oracle Critical Patch Update
4	Oracle Critical Patch Update Advisory - October 2016	http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
5	Oracle Solaris Third Party Bulletin - October 2016	http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html

Change Log

No	Changed Details	Date of change
0	[2016年07月11日] 掲載 [2016年12月05日] ベンダ情報：オラクル (Oracle Critical Patch Update Advisory - October 2016) を追加ベンダ情報：オラクル (Oracle Solaris Third Party Bulletin - October 2016) を追加	Feb. 17, 2018, 10:37 a.m.