tlsenum

tlsenum tlsenum es una herramienta de enumeración TLS de línea de comandos que intenta enumerar qué conjuntos de cifrado TLS soporta un servidor y listarlos en orden de prioridad. Funciona enviando mensajes TLS ClientHello y analizando las respuestas ServerHello del servidor. tlsenum asume que el...

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

cve-2021-3449

CVE-2021-3449 OpenSSL 该问题于 2021 年 3 月 17 日由诺基亚报告给 OpenSSL。修复由 Peter Kästle 和 Samuel Sapalski（诺基亚）开发。 缓解措施 已知的唯一修复方法是更新 libssl1.1。 即使某些应用默认使用强化 TLS 配置禁用了 TLS 重新协商， 如果它们运行在旧版 OpenSSL 上，仍然会受到此漏洞的影响。 利用代码 main.go 是一个小巧的脚本，它连接到一个 TLS 服务器，强制重新协商，然后断开连接。 利用代码被注入到 Go 1.14.15 捆绑的 encoding/tls 包中。 你可以在...

EUVD-2026-63092

Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing...

Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713. Patch Instruction...

SUSE-SU-2026:4042-1 Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713...

SUSE-SU-2026:4036-1 Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713...

Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713. Patch Instruction...

Astra Linux – Vulnerability in mbedtls

A issue was discovered in Mbed TLS 3.5.1. There is a persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions...

Astra Linux – Vulnerability in mbedtls

A vulnerability was discovered in Mbed TLS before versions 2.28.1 and 3.x, prior to 3.2.0. In some configurations, an unauthenticated attacker can send an invalid ClientHello message to a DTLS server, causing a heap-based buffer overflow of up to 255 bytes. This can lead to a server crash or,...

Linux Distros Unpatched Vulnerability : CVE-2026-75596

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler...

Improper Check for Unusual or Exceptional Conditions

Overview io.netty:netty-handler is a library that provides an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which...

CVE-2026-75596

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler constructors use the pre-handshake ClientHello aggregation path in handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java at...

DEBIAN-CVE-2026-75596

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler constructors use the pre-handshake ClientHello aggregation path in handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java at...

CVE-2026-75596

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler constructors use the pre-handshake ClientHello aggregation path in handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java at...

UBUNTU-CVE-2026-75596

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler constructors use the pre-handshake ClientHello aggregation path in handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java at...

CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

CVE-2026-75595

Netty (asynchronous, event-driven network framework) is affected by an SNI routing bypass in io.netty.handler.ssl.SslClientHelloHandler#decode . The method checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records triggers an ...

CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

CVE-2026-75596

In Netty versions before 4.1.137.Final and 4.2.17.Final, the default SniHandler constructors trigger quadratic CPU work in SslClientHelloHandler#decode by recopying the entire handshake buffer for every additional TLS record. An unauthenticated remote attacker can fragment a large ClientHello int...