CVE-2014-3466_PoC

Proof of Concept for CVE-2014-3466 GnuTLS buffer overflow: session id length check Information See: https://bugzilla.redhat.com/showbug.cgi?id=1101932 This is not a weaponized exploit. be warned: this python code is ugly, I pretty much handcrafted the ServerHello and spent only about five fifteen...

RUSTSEC-2026-0349 Unauthenticated ServerHello can downgrade later connections to classical key exchange

The client recorded the server-selected key exchange group for each server name when processing the ServerHello, before the server was authenticated. This record is used to predict which key share to send in future ClientHellos to that server name. A network attacker can answer one connection...

CVE-2026-102712: Out-of-bounds Read

On the first DTLS ClientHello, the parser copies a device-claimed sessionid length and validates the ciphersuite-list length against the total record length instead of the remaining bytes. An unauthenticated peer drives an OOB source read of up to 255 bytes, and those bytes are echoed verbatim in...

PT-2026-102760

Name of the Vulnerable Software and Affected Versions The product name cannot be determined affected versions not specified Description During the first DTLS ClientHello, the parser copies a device-claimed session id length and validates the ciphersuite-list length against the total record length...

CVE-2026-3230 Improper key_share validation in TLS 1.3 HelloRetryRequest

Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required keyshare extension,...

CVE-2026-26994 uTLS ServerHellos are accepted without checking TLS 1.3 downgrade canaries

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. In versions 1.6.7 and below, uTLS did not implement the TLS 1.3 downgrade protection mechanism specified in RFC 8446 Section 4.1.3 when using a uTLS ClientHello spe...

CVE-2026-26994

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. In versions 1.6.7 and below, uTLS did not implement the TLS 1.3 downgrade protection mechanism specified in RFC 8446 Section 4.1.3 when using a uTLS ClientHello spe...

CVE-2026-26994: Protection Mechanism Failure

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. In versions 1.6.7 and below, uTLS did not implement the TLS 1.3 downgrade protection mechanism specified in RFC 8446 Section 4.1.3 when using a uTLS ClientHello spe...

MiracleLinux 7 : nss-3.36.0-7.el7 (AXSA:2018-3341:02)

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2018-3341:02 advisory. nss: ServerHello.random is all zeros when handling a v2-compatible ClientHello CVE-2018-12384 Tenable has extracted the preceding description block directly...

GO-2025-3638 ServerHellos are accepted without checking TLS 1.3 downgrade canaries in github.com/refraction-networking/utls

Before version 1.7.0, utls did not implement the TLS 1.3 downgrade protection mechanism specified in RFC 8446 Section 4.1.3 when using a utls ClientHello spec. This allowed an active network adversary to downgrade TLS 1.3 connections initiated by a utls client to a lower TLS version e.g., TLS 1.2...

Authentication flaw

wolfSSL prior to 5.6.6 did not check that messages in one DTLS record do not span key boundaries. As a result, it was possible to combine DTLS messages using different keys into one DTLS record. The most extreme edge case is that, in DTLS 1.3, it was possible that an unencrypted DTLS 1.3 record...

CVE-2023-6937

wolfSSL prior to 5.6.6 did not check that messages in one DTLS record do not span key boundaries. As a result, it was possible to combine DTLS messages using different keys into one DTLS record. The most extreme edge case is that, in DTLS 1.3, it was possible that an unencrypted DTLS 1.3 record...

CVE-2023-6937: Improper Input Validation

wolfSSL prior to 5.6.6 did not check that messages in one DTLS record do not span key boundaries. As a result, it was possible to combine DTLS messages using different keys into one DTLS record. The most extreme edge case is that, in DTLS 1.3, it was possible that an unencrypted DTLS 1.3 record...

Huawei EulerOS: Security Advisory for nss (EulerOS-SA-2018-1358)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2020 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...

EulerOS Virtualization for ARM 64 3.0.1.0 : nss (EulerOS-SA-2019-1397)

According to the versions of the nss packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - A flaw was found in the way NSS responded to an SSLv2-compatible ClientHello with a ServerHello that had an all-zero...

openSUSE Security Update : mozilla-nspr and mozilla-nss (openSUSE-2019-1039)

This update for mozilla-nss and mozilla-nspr fixes the following issues : Issues fixed in mozilla-nss : - Update to NSS 3.40.1 bsc1119105 - CVE-2018-12404: Fixed a cache side-channel variant of the Bleichenbacher attack bsc1119069 - CVE-2018-12384: Fixed an issue in the SSL handshake. NSS respond...

Remote Code Execution (RCE)

gnutls is vulnerable to remote code execution RCE attacks. The vulnerability exists due to a possible buffer overflow in the readserverhello function in lib/gnutlshandshake.c in GnuTLS before 3.1.25, 3.2.x before 3.2.15, and 3.3.x before 3.3.4 allows remote servers to cause a denial of service...

Security update for mozilla-nss (moderate)

This update for mozilla-nss to version 3.36.6 fixes the following issues: Security issues fixed: - CVE-2018-12384: NSS responded to an SSLv2-compatible ClientHello with a ServerHello that had an all-zero random bmo1483128, boo1106873 - CVE-2018-12404: Cache side-channel variant of the...

nss: ServerHello.random is all zeros when handling a v2-compatible ClientHello

A flaw was found in the way NSS responded to an SSLv2-compatible ClientHello with a ServerHello that had an all-zero random. A man-in-the-middle attacker could use this flaw in a passive replay attack...

nss: ServerHello.random is all zeros when handling a v2-compatible ClientHello

A flaw was found in the way NSS responded to an SSLv2-compatible ClientHello with a ServerHello that had an all-zero random. A man-in-the-middle attacker could use this flaw in a passive replay attack...