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.

An issue was discovered in ssl.c in Axel before 2.17.8. The TLS implementation lacks hostname verification.

HttpUtils#getURLConnection method disables explicitly hostname verification for HTTPS connections making clients vulnerable to man-in-the-middle attacks. Calcite uses internally this method to connect with Druid and Splunk so information leakage may happen when using the respective Calcite adapters. The method itself is in a utility class so people may use it to create vulnerable HTTPS connections for other applications. From Apache Calcite 1.26 onwards, the hostname verification will be performed using the default JVM truststore.

The Restaurant Karaoke SHIDAX app 1.3.3 and earlier on Android does not verify SSL certificates, which allows remote attackers to obtain sensitive information via a man-in-the-middle attack.

Smartphone Passbook 1.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to obtain sensitive information from encrypted communications via a crafted certificate.

The Dollar Bank Mobile app 2.6.3 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

IBM QRadar Suite Products 1.10.12.0 through 1.10.18.0 and IBM Cloud Pak for Security 1.10.0.0 through 1.10.11.0 could disclose sensitive information using man in the middle techniques due to not correctly enforcing all aspects of certificate validation in some circumstances. IBM X-Force ID: 272533.

The fsb-dequeen-mobile-banking/id1091025340 app 3.0.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "PCSB BANK Mobile" by PCSB Bank app 3.0.4 -- aka pcsb-bank-mobile/id1067472090 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The athens-state-bank-mobile-banking/id719748589 app 3.0.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Citizens Community Bank (TN) ccb-mobile-banking/id610030469 app 3.0.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The PUMA PUMATRAC app 3.0.2 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "SCSB Shelbyville IL Mobile Banking" by Shelby County State Bank app 3.0.0 -- aka scsb-shelbyville-il-mobile-banking/id938960224 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "Peoples Bank Tulsa" by Peoples Bank - OK app 3.0.2 -- aka peoples-bank-tulsa/id1074279285 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "State Bank of Waterloo Mobile Banking" by State Bank of Waterloo app 3.0.2 -- aka state-bank-of-waterloo-mobile-banking/id555321714 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "SVB Mobile" by Sauk Valley Bank Mobile Banking app 3.0.0 -- aka svb-mobile/id796429885 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The mount-vernon-bank-trust-mobile-banking/id542706679 app 3.0.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The avb-bank-mobile-banking/id592565443 app 3.0.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The financial-plus-mobile-banking/id731070564 app 3.0.3 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The "RVCB Mobile" by RVCB Mobile Banking app 3.0.0 -- aka rvcb-mobile/id757928895 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

In Redgate SQL Monitor 7.1.4 through 10.1.6 (inclusive), the scope for disabling some TLS security certificate checks can extend beyond that defined by various options on the Configuration > Notifications pages to disable certificate checking for alert notifications. These TLS security checks are also ignored during monitoring of VMware machines. This would make SQL Monitor vulnerable to potential man-in-the-middle attacks when sending alert notification emails, posting to Slack or posting to webhooks. The vulnerability is fixed in version 10.1.7.

The "FNB Kemp Mobile Banking" by First National Bank of Kemp app 3.0.2 -- aka fnb-kemp-mobile-banking/id571448725 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Acceptance of invalid/self-signed TLS certificates in Atlassian HipChat before 3.16.2 for iOS allows a man-in-the-middle and/or physically proximate attacker to silently intercept information sent during the login API call.

Acceptance of invalid/self-signed TLS certificates in "Foxit PDF - PDF reader, editor, form, signature" before 5.4 for iOS allows a man-in-the-middle and/or physically proximate attacker to silently intercept login information (username/password), in addition to the static authentication token if the user is already logged in.

The SumaHo application 3.0.0 and earlier for Android and the SumaHo "driving capability" diagnosis result transmission application 1.2.2 and earlier for Android allow man-in-the-middle attackers to spoof servers and obtain sensitive information by leveraging failure to verify SSL/TLS server certificates.

The America's First Federal Credit Union (FCU) Mobile Banking app 3.1.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The State Bank of India State Bank Anywhere app 5.1.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

When Security Assertion Markup Language (SAML) authentication is enabled, Juniper Networks Mist Cloud UI might incorrectly process invalid authentication certificates which could allow a malicious network-based user to access unauthorized data. This issue affects all Juniper Networks Mist Cloud UI versions prior to September 2 2020.

The 21st Century Insurance app 10.0.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Emirates NBD Bank P.J.S.C Emirates NBD KSA app 3.10.0 through 3.10.4 (UAE) and 2.0.1 through 2.1.0 (KSA) for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Everyday Health Diabetes in Check: Blood Glucose & Carb Tracker app 3.4.2 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Cyberduck before 4.4.4 on Windows does not properly validate X.509 certificate chains, which allows man-in-the-middle attackers to spoof FTP-SSL servers via a certificate issued by an arbitrary root Certification Authority.

The TradeKing Forex for iPhone app 1.2.1 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

ovirt-engine, as used in Red Hat MRG 3, allows man-in-the-middle attackers to spoof servers by leveraging failure to verify key attributes in vdsm X.509 certificates.

The Great Southern Bank Great Southern Mobile Banking app before 4.0.4 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Electronic Funds Source (EFS) Mobile Driver Source app 2.5 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Banco Santander Mexico SA Supermovil app 3.5 through 3.7 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The Banco de Costa Rica BCR Movil app 3.7 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The PayQuicker app 1.0.0 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The ThreatTrack VIPRE Password Vault app through 1.100.1090 for iOS has Missing SSL Certificate Validation.

DefaultHostnameVerifier in Ldaptive (formerly vt-ldap) does not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Dell Unity prior to 5.3 contains a 'man in the middle' vulnerability in the vmadapter component. If a customer has a certificate signed by a third-party public Certificate Authority, the vCenter CA could be spoofed by an attacker who can obtain a CA-signed certificate.

lib/QoreSocket.cpp in Qore before 0.9.4.2 lacks hostname verification for X.509 certificates.

The boost ASIO wrapper in net/asio.cpp in Pichi before 1.3.0 lacks TLS hostname verification.

The Space Coast Credit Union Mobile app 2.2 for iOS and 2.1.0.1104 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.

The Think Mutual Bank Mobile Banking app 3.1.5 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

An exploitable information leak vulnerability exists in the ustream-ssl library of OpenWrt, versions 18.06.4 and 15.05.1. When connecting to a remote server, the server's SSL certificate is checked but no action is taken when the certificate is invalid. An attacker could exploit this behavior by performing a man-in-the-middle attack, providing any certificate, leading to the theft of all the data sent by the client during the first request.An exploitable information leak vulnerability exists in the ustream-ssl library of OpenWrt, versions 18.06.4 and 15.05.1. When connecting to a remote server, the server's SSL certificate is checked but no action is taken when the certificate is invalid. An attacker could exploit this behavior by performing a man-in-the-middle attack, providing any certificate, leading to the theft of all the data sent by the client during the first request.

IBM QRadar SIEM 7.2.8 WinCollect could allow an attacker to obtain sensitive information by spoofing a trusted entity using man in the middle techniques due to not validating or incorrectly validating a certificate. IBM X-Force ID: 160072.

MSA/SMTP.cpp in Trojita before 0.8 ignores certificate-verification errors, which allows man-in-the-middle attackers to spoof SMTP servers.