NVD Vulnerability Detail

CVE-2019-13050

Summary	Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack.
Publication Date	June 30, 2019, 2:15 a.m.
Registration Date	Jan. 26, 2021, 11:38 a.m.
Last Update	Nov. 21, 2024, 1:24 p.m.

CVSS3.1 : HIGH
スコア	7.5
Vector	CVSS:3.1/AV:N/AC:L/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)	低
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	5.0
Vector	AV:N/AC:L/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)	低
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:gnupg:gnupg::::::::		2.2.16
cpe:2.3:a:sks_keyserver_project:sks_keyserver::::::::		1.2.0

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:29:::::::*
cpe:2.3:o:fedoraproject:fedora:30:::::::*

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.0:::::::*
cpe:2.3:o:opensuse:leap:15.1:::::::*

Configuration4		or higher	or less	more than	less than
cpe:2.3:a:f5:traffix_signaling_delivery_controller::::::::		5.0.0	5.1.0

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00039.html	Mailing List Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00039.html	Mailing List Third Party Advisory
3	https://gist.github.com/rjhansen/67ab921ffb4084c865b3618d6955275f	Exploit Issue Tracking Mitigation Third Party Advisory
4	https://gist.github.com/rjhansen/67ab921ffb4084c865b3618d6955275f	Exploit Issue Tracking Mitigation Third Party Advisory
5	https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
6	https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
7	https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
8	https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
9	https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
10	https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
11	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUK2YRO6QIH64WP2LRA5D4LACTXQPPU4/
12	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUK2YRO6QIH64WP2LRA5D4LACTXQPPU4/
13	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CP4ON34YEXEZDZOXXWV43KVGGO6WZLJ5/
14	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CP4ON34YEXEZDZOXXWV43KVGGO6WZLJ5/
15	https://lists.gnupg.org/pipermail/gnupg-announce/2019q3/000439.html	Third Party Advisory
16	https://lists.gnupg.org/pipermail/gnupg-announce/2019q3/000439.html	Third Party Advisory
17	https://support.f5.com/csp/article/K08654551	Third Party Advisory
18	https://support.f5.com/csp/article/K08654551	Third Party Advisory
19	https://support.f5.com/csp/article/K08654551?utm_source=f5support&amp%3Butm_medium=RSS
20	https://support.f5.com/csp/article/K08654551?utm_source=f5support&amp%3Butm_medium=RSS
21	https://twitter.com/lambdafu/status/1147162583969009664	Third Party Advisory
22	https://twitter.com/lambdafu/status/1147162583969009664	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-295	不正な証明書検証	https://cwe.mitre.org/data/definitions/295.html

JVN Vulnerability Information

sks-keyserver code および GnuPG におけるホストの不一致による証明書の検証に関する脆弱性

Title	sks-keyserver code および GnuPG におけるホストの不一致による証明書の検証に関する脆弱性
Summary	sks-keyserver code および GnuPG には、ホストの不一致による証明書の検証に関する脆弱性が存在します。
Possible impacts	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	July 9, 2019, midnight
Registration Date	July 9, 2019, 6:06 p.m.
Last Update	July 9, 2019, 6:06 p.m.

Affected System

GNU Project

GnuPG 2.2.16 まで

SKS Keyserver project

SKS Keyserver 1.2.0 まで

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-2019-13050	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13050
National Vulnerability Database (NVD)
2	CVE-2019-13050	https://nvd.nist.gov/vuln/detail/CVE-2019-13050

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-297	https://cwe.mitre.org/data/definitions/297.html

ベンダー情報

No	Name	URL
GitHub
1	SKS Keyserver Network Under Attack	https://gist.github.com/rjhansen/67ab921ffb4084c865b3618d6955275f
GnuPG
2	GnuPG	https://gnupg.org/index.html

Change Log

No	Changed Details	Date of change
1	[2019年07月09日] 掲載	July 9, 2019, 6:06 p.m.