CVE-2020-1758
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I. Basic Information for CVE-2020-1758
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in Keycloak in versions before 10.0.0, where it does not perform the TLS hostname verification while sending emails using the SMTP server. This flaw allows an attacker to perform a man-in-the-middle (MITM) attack.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对宿主不匹配的证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Red Hat Keycloak 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Keycloak是美国红帽（Red Hat）公司的一套为现代应用和服务提供身份验证和管理功能的软件。 Red Hat Keycloak 10.0.0之前版本中存在安全漏洞，该漏洞源于在使用SMTP服务器发送电子邮件时未正确执行TLS主机名验证。攻击者可利用该漏洞实施中间人（MITM）攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2020-1758
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://issues.redhat.com/browse/KEYCLOAK-13285x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1758x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2020-1758
IV. Related Vulnerabilities
Same product: keycloak
- CVE-2025-12150
Org.keycloak/keycloak-services: webauthn attestation stateme - CVE-2025-13467
Org.keycloak.storage.ldap: keycloak: deserialization of untr - CVE-2025-11538
Keycloak-server: debug default bind address - CVE-2025-12390
Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline - CVE-2025-10939
Org.keycloak/keycloak-quarkus-server: unable to restrict acc
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-297
- CVE-2026-43869
Apache Thrift: TSSLTransportFactory.java hostname verificati - CVE-2026-41603
Apache Thrift: Java TSSLTransportFactory hostname verificati - CVE-2026-34477
Apache Log4j Core: verifyHostName attribute silently ignored - CVE-2025-59060
Apache Ranger: Hostname verification bypass in NiFiRegistryC - CVE-2026-26214
Xiaomi Galaxy FDS Android SDK <= 3.0.8 TLS Hostname Verifica
V. Comments for CVE-2020-1758
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