Denial Of Service (DoS)

mbedtls is vulnerable to denial of service. The vulnerability exists through a buffer overread when the dtls server with MBEDTLSSSLDTLSCLIENTPORTREUSE in use receives a ClientHello message with a cookie whose declared length exceeds the end of the allocated buffer which allows an attacker to caus...

DEBIAN-CVE-2022-35409

An issue was discovered in Mbed TLS before 2.28.1 and 3.x before 3.2.0. In some configurations, an unauthenticated attacker can send an invalid ClientHello message to a DTLS server that causes a heap-based buffer over-read of up to 255 bytes. This can cause a server crash or possibly information...

Mbed TLS 缓冲区错误漏洞

Mbed TLS is an open source, portable, easy-to-use, readable and flexible SSL library. A buffer error vulnerability exists in Mbed TLS versions prior to 2.28.2 and 3.x versions prior to 3.2.0, which stems from the fact that in certain configurations, an unauthenticated attacker can send an invalid...

PT-2022-22810

Name of the Vulnerable Software and Affected Versions Mbed TLS versions prior to 2.28.1 Mbed TLS versions 3.x prior to 3.2.0 Description An issue was discovered in Mbed TLS where an unauthenticated attacker can send an invalid ClientHello message to a DTLS server, causing a heap-based buffer...

Fortinet FortiGate Input Validation Error Vulnerability

Fortinet FortiGate, a next-generation firewall product developed by Fortinet, is vulnerable to an input validation error that could be exploited to disclose sensitive information via SNI client Hello TLS packets...

CVE-2020-15936

A improper input validation in Fortinet FortiGate version 6.4.3 and below, version 6.2.5 and below, version 6.0.11 and below, version 5.6.13 and below allows attacker to disclose sensitive information via SNI Client Hello TLS packets...

Input validation

A improper input validation in Fortinet FortiGate version 6.4.3 and below, version 6.2.5 and below, version 6.0.11 and below, version 5.6.13 and below allows attacker to disclose sensitive information via SNI Client Hello TLS packets...

CVE-2020-15936

A improper input validation in Fortinet FortiGate version 6.4.3 and below, version 6.2.5 and below, version 6.0.11 and below, version 5.6.13 and below allows attacker to disclose sensitive information via SNI Client Hello TLS packets...

CVE-2020-15936

Fortinet FortiGate has a CVE-2020-15936 vulnerability due to improper input validation that enables disclosure of sensitive information via SNI Client Hello TLS packets. Affected versions are FortiGate 6.4.3 and below, 6.2.5 and below, 6.0.11 and below, and 5.6.13 and below. The issue is document...

CVE-2020-15936: Improper Input Validation

A improper input validation in Fortinet FortiGate version 6.4.3 and below, version 6.2.5 and below, version 6.0.11 and below, version 5.6.13 and below allows attacker to disclose sensitive information via SNI Client Hello TLS packets...

UBUNTU-CVE-2021-34749

A vulnerability in Server Name Identification SNI request filtering of Cisco Web Security Appliance WSA, Cisco Firepower Threat Defense FTD, and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from...

SUSE: Security Advisory (SUSE-SU-2020:0948-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

The vulnerability in the implementation of the TLS protocol by the OpenSSL library, which allows a attacker to cause a service failure

The vulnerability of the TLS protocol implementation in the OpenSSL library is related to pointer arithmetic errors. Exploiting this vulnerability allows a malicious actor to cause a service failure by using a specially crafted “ClientHello” message...

SNIcat - Server Name Indication Concatenator

SNIcat is a proof of concept tool that performs data exfiltration, utilizing a covert channel method via. Server Name Indication , a TLS Client Hello Extension. The tool consists of an agent which resides on the compromised internal host, and a Command &Control Server which controls the agent and...

CVE-2020-2035: Improper Input Validation

When SSL/TLS Forward Proxy Decryption mode has been configured to decrypt the web transactions, the PAN-OS URL filtering feature inspects the HTTP Host and URL path headers for policy enforcement on the decrypted HTTPS web transactions but does not consider Server Name Indication SNI field within...

The vulnerability of the `send_client_hello` function in `handshake.c` of the GnuTLS cryptographic library is related to deficiencies in the cryptographic algorithms used. This vulnerability allows an attacker to gain unauthorized access to confidential data or compromise the integrity of the data.

The vulnerability of the sendclienthello function in the handshake.c file of the GnuTLS cryptographic library is related to deficiencies in the cryptographic algorithms used. Exploiting this vulnerability could allow an attacker to gain unauthorized access to confidential data or compromise the...

gnutls: DTLS client hello contains a random value of all zeroes

A cryptographic weakness was found in the way DLTS implementation of GnuTLS, used zeros in place of random numbers. This flaw can break the security guarantee of the DTLS protocol...

Out-of-Bounds

Overview Affected versions of this package are vulnerable to Out-of-Bounds wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL...

Buffer overflow

wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length,...

ALPINE-CVE-2018-12384

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-zero value instead. This results in full malleability of the ClientHello for SSLv2 used for TLS 1.2 in all versions prior to NSS 3.39. This does not impact TLS 1.3...