EEF-CVE-2026-55953 TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication

Summary The Erlang/OTP ssl TLS 1.2 and earlier and DTLS client does not verify that the cipher suite selected by the server in ServerHello was among the suites offered by the client in ClientHello. The client-side tls\handshake:hello/5 handler validates the negotiated protocol version and the...

CVE-2026-55953 TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication

The Erlang/OTP ssl TLS 1.2 and earlier and DTLS client does not verify that the cipher suite selected by the server in ServerHello was among the suites offered by the client in ClientHello. The client-side tlshandshake:hello/5 handler validates the negotiated protocol version and the downgrade...

Erlang/OTP -- (D)TLS-1.2 server certificate verification bypass

https://github.com/erlang/otp/security/advisories/GHSA-c6cw-pr89-w882 reports: The OTP TLS/DTLS client pre TLS-1.3 does not verify that the cipher suite selected by the server in ServerHello is one of those offered in ClientHello. A man-in-the-middle attacker can select an anonymous cipher suite...

EUVD-2013-6609

Malware in sbrugna...

EUVD-2014-0389

Malware in sbrugna...

CVE-2025-52585

CVE-2025-52585 affects BIG-IP BIG-IP LTM Client SSL profile when SSL Forward Proxy is enabled and ADH ciphers are active. Undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate, disrupting traffic (DoS) with remote unauthenticated access. Supported advisories indicat...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

qpid-proton: TLS Man in the Middle Vulnerability

A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted...

CVE-2013-6807

The client in OpenText Exceed OnDemand EoD 8 supports anonymous ciphers by default, which allows man-in-the-middle attackers to bypass server certificate validation, redirect a connection, and obtain sensitive information via crafted responses...

Design/Logic Flaw

The client in OpenText Exceed OnDemand EoD 8 supports anonymous ciphers by default, which allows man-in-the-middle attackers to bypass server certificate validation, redirect a connection, and obtain sensitive information via crafted responses...

CVE-2013-6807

CVE-2013-6807 affects OpenText Exceed OnDemand (EoD) 8. The vulnerability arises because the client supports anonymous ciphers by default, enabling man-in-the-middle attackers to bypass server certificate validation, redirect connections, and obtain sensitive information from crafted responses. R...

tomcat anonymous cipher issue

The default SSL cipher configuration in Apache Tomcat 4.1.28 through 4.1.31, 5.0.0 through 5.0.30, and 5.5.0 through 5.5.17 uses certain insecure ciphers, including the anonymous cipher, which allows remote attackers to obtain sensitive information or have other, unspecified impacts...