NVD Vulnerability Detail

CVE-2019-14899

Summary	A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting, and determine the correct sequence and acknowledgement numbers in use, allowing the bad actor to inject data into the TCP stream. This provides everything that is needed for an attacker to hijack active connections inside the VPN tunnel.
Publication Date	Dec. 12, 2019, 12:15 a.m.
Registration Date	Jan. 26, 2021, 11:39 a.m.
Last Update	Nov. 21, 2024, 1:27 p.m.

CVSS3.1 : HIGH
スコア	7.4
Vector	CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
攻撃元区分(AV)	隣接
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	低
利用者の関与(UI)	要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : MEDIUM
Score	4.9
Vector	AV:A/AC:M/Au:S/C:P/I:P/A:P
攻撃元区分(AV)	隣接
攻撃条件の複雑さ(AC)	中
攻撃前の認証要否(Au)	単一
機密性への影響(C)	低
完全性への影響(I)	低
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	はい

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:o:freebsd:freebsd:-:::::::*
cpe:2.3:o:linux:linux_kernel:-:::::::*
cpe:2.3:o:openbsd:openbsd:-:::::::*

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:apple:mac_os_x::::::::				10.15.6
cpe:2.3:o:apple:tvos::::::::				13.4.8
cpe:2.3:o:apple:iphone_os::::::::				13.6
cpe:2.3:o:apple:ipados::::::::				13.6
cpe:2.3:o:apple:macos:11.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://seclists.org/fulldisclosure/2020/Dec/32	Mailing List Third Party Advisory
2	http://seclists.org/fulldisclosure/2020/Dec/32	Mailing List Third Party Advisory
3	http://seclists.org/fulldisclosure/2020/Jul/23	Mailing List Third Party Advisory
4	http://seclists.org/fulldisclosure/2020/Jul/23	Mailing List Third Party Advisory
5	http://seclists.org/fulldisclosure/2020/Jul/24	Mailing List Third Party Advisory
6	http://seclists.org/fulldisclosure/2020/Jul/24	Mailing List Third Party Advisory
7	http://seclists.org/fulldisclosure/2020/Jul/25	Mailing List Third Party Advisory
8	http://seclists.org/fulldisclosure/2020/Jul/25	Mailing List Third Party Advisory
9	http://seclists.org/fulldisclosure/2020/Nov/20	Mailing List Third Party Advisory
10	http://seclists.org/fulldisclosure/2020/Nov/20	Mailing List Third Party Advisory
11	http://www.openwall.com/lists/oss-security/2020/08/13/2	Mailing List Third Party Advisory
12	http://www.openwall.com/lists/oss-security/2020/08/13/2	Mailing List Third Party Advisory
13	http://www.openwall.com/lists/oss-security/2020/10/07/3	Mailing List Third Party Advisory
14	http://www.openwall.com/lists/oss-security/2020/10/07/3	Mailing List Third Party Advisory
15	http://www.openwall.com/lists/oss-security/2021/07/05/1	Mailing List Third Party Advisory
16	http://www.openwall.com/lists/oss-security/2021/07/05/1	Mailing List Third Party Advisory
17	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899	Issue Tracking Third Party Advisory
18	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899	Issue Tracking Third Party Advisory
19	https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/	Third Party Advisory
20	https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/	Third Party Advisory
21	https://support.apple.com/kb/HT211288	Third Party Advisory
22	https://support.apple.com/kb/HT211288	Third Party Advisory
23	https://support.apple.com/kb/HT211289	Third Party Advisory
24	https://support.apple.com/kb/HT211289	Third Party Advisory
25	https://support.apple.com/kb/HT211290	Third Party Advisory
26	https://support.apple.com/kb/HT211290	Third Party Advisory
27	https://support.apple.com/kb/HT211850	Third Party Advisory
28	https://support.apple.com/kb/HT211850	Third Party Advisory
29	https://support.apple.com/kb/HT211931	Third Party Advisory
30	https://support.apple.com/kb/HT211931	Third Party Advisory

Common Vulnerabilities List

JVN Vulnerability Information

複数の製品における脆弱性

Title	複数の製品における脆弱性
Summary	複数の製品には、不特定の脆弱性が存在します。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダ情報および参考情報を参照して適切な対策を実施してください。
Publication Date	Nov. 21, 2019, midnight
Registration Date	Dec. 25, 2019, 3:57 p.m.
Last Update	Dec. 25, 2019, 3:57 p.m.

Affected System

OpenBSD

アップル

Apple Mac OS X

iOS

FreeBSD

Linux

Linux Kernel

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-2019-14899	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14899
National Vulnerability Database (NVD)
2	CVE-2019-14899	https://nvd.nist.gov/vuln/detail/CVE-2019-14899

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-Other	https://www.ipa.go.jp/security/vuln/CWE.html#CWEOther

ベンダー情報

No	Name	URL
Apple
1	Top Page	https://www.apple.com/
FreeBSD
2	Top Page	https://www.freebsd.org/
Linux Kernel
3	Linux Kernel Archives	http://www.kernel.org
OpenBSD
4	Top Page	https://www.openbsd.org/

その他

No	Name	URL
関連文書
1	Bug 1774905 (CVE-2019-14899) - CVE-2019-14899 VPN: an attacker can inject data into the TCP stream which allows a hijack of active connections inside the VPN tunnel	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899

Change Log

No	Changed Details	Date of change
1	[2019年12月25日] 掲載	Dec. 25, 2019, 3:57 p.m.