NVD Vulnerability Detail

CVE-2018-8970

Summary	The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.
Publication Date	March 25, 2018, 6:29 a.m.
Registration Date	March 1, 2021, 7:43 p.m.
Last Update	Nov. 21, 2024, 1:14 p.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:openbsd:libressl:2.7.0:::::::*

Related information, measures and tools

No	URL	タグ
1	https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff	Third Party Advisory
2	https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff	Third Party Advisory
3	https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt	Vendor Advisory
4	https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt	Vendor Advisory
5	https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42	Patch Third Party Advisory
6	https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42	Patch 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

LibreSSL における証明書検証に関する脆弱性

Title	LibreSSL における証明書検証に関する脆弱性
Summary	LibreSSL には、証明書検証に関する脆弱性が存在します。
Possible impacts	情報を取得される、および情報を改ざん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	March 23, 2018, midnight
Registration Date	May 23, 2018, 11:26 a.m.
Last Update	May 23, 2018, 11:26 a.m.

Affected System

OpenBSD

LibreSSL 2.7.1 未満の 2.7.0

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-2018-8970	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8970
National Vulnerability Database (NVD)
2	CVE-2018-8970	https://nvd.nist.gov/vuln/detail/CVE-2018-8970

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-295	https://cwe.mitre.org/data/definitions/295.html

ベンダー情報

No	Name	URL
GitHub
1	Call strlen() if name length provided is 0, like OpenSSL does.	https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42
OpenBSD
2	changes from 2.7.0	https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt

Change Log

No	Changed Details	Date of change
1	[2018年05月23日] 掲載	May 23, 2018, 11:26 a.m.