CVE-2026-27017 uTLS has a Chrome Parrot Fingerprint Vulnerability due to GREASE ECH Cipher Suite Mismatch

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. Versions 1.6.0 through 1.8.0 contain a fingerprint mismatch with Chrome when using GREASE ECH, related to cipher suite selection. When Chrome selects the preferred...

CVE-2026-27017: Use of a Cryptographic Primitive with a Risky Implementation

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. Versions 1.6.0 through 1.8.0 contain a fingerprint mismatch with Chrome when using GREASE ECH, related to cipher suite selection. When Chrome selects the preferred...

uTLS security vulnerability

uTLS is an open-source Go language codebase developed by Refraction Networking. Versions 1.6.0 to 1.8.0 of uTLS contain security vulnerabilities. These vulnerabilities stem from inconsistent password selection logic when using GREASE ECH, which may lead to fingerprint mismatches...

Use of a Cryptographic Primitive with a Risky Implementation

Overview Affected versions of this package are vulnerable to Use of a Cryptographic Primitive with a Risky Implementation in the HelloChrome120, HelloChrome120PQ, HelloChrome131 and HelloChrome133 symbols due to inconsistent ciphersuite selection between the outer ClientHello and ECH for GREASE...

uTLS has a fingerprint vulnerability from GREASE ECH mismatch for Chrome parrots

There is a fingerprint mismatch with Chrome when using GREASE ECH, having to do with ciphersuite selection. When Chrome selects the preferred ciphersuite in the outer ClientHello and the ciphersuite for ECH, it does so consistently based on hardware support. That means, for example, if it prefers...

GHSA-7M29-F4HW-G2VX uTLS has a fingerprint vulnerability from GREASE ECH mismatch for Chrome parrots

There is a fingerprint mismatch with Chrome when using GREASE ECH, having to do with ciphersuite selection. When Chrome selects the preferred ciphersuite in the outer ClientHello and the ciphersuite for ECH, it does so consistently based on hardware support. That means, for example, if it prefers...

PT-2026-20995

Name of the Vulnerable Software and Affected Versions uTLS versions 1.6.0 through 1.8.0 Description uTLS is a customized version of crypto/tls designed for fingerprinting resistance during the handshake process. Versions 1.6.0 through 1.8.0 exhibit a fingerprint mismatch with Chrome when utilizin...

MAL-2025-11271 Malicious code in @zalastax/nolb-ech (npm)

The package @zalastax/nolb-ech was found to contain malicious code...

Malicious code in @zalastax/nolb-ech (npm)

The package @zalastax/nolb-ech was found to contain malicious code...

SUSE CVE-2015-5309

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service memory corruption or possibly execute arbitrary code via an ECH erase characters escape sequence with a large parameter value, which triggers a buffer underflow...

SUSE: Security Advisory (SUSE-SU-2022:2536-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 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...

Fedora 23 : putty-0.66-1.fc23 (2015-3d17682c15)

This is new version of putty. ---- This is an update fixing integer overflow and buffer underrun in erase characters ECH handling. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically...

PuTTY Integer Overflow Vulnerability

PuTTY is a free Telnet, Rlogin and SSH client software developed by software developer Simon Tatham. The software is mainly used for remote administration of Linux systems. An integer overflow vulnerability exists in the terminal emulator in PuTTY versions prior to 0.66. A remote attacker can...

Integer overflow

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service memory corruption or possibly execute arbitrary code via an ECH erase characters escape sequence with a large parameter value, which triggers a buffer underflow...

CVE-2015-5309

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service memory corruption or possibly execute arbitrary code via an ECH erase characters escape sequence with a large parameter value, which triggers a buffer underflow...

CVE-2015-5309

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service memory corruption or possibly execute arbitrary code via an ECH erase characters escape sequence with a large parameter value, which triggers a buffer underflow...

Debian DLA-347-1 : putty security update

It was discovered that PuTTY's terminal emulator did not properly validate the parameter to the ECH erase characters control sequence, allowing a denial of service and possibly remote code execution. For the oldoldstable distribution squeeze, this problem has been fixed in version...

DLA-347-1 putty - security update

Bulletin has no description...

putty: arbitrary code execution

A potential memory-corrupting integer overflow has been discovered in the handling of the ECH erase characters control sequence in the terminal emulator. To exploit a vulnerability in the terminal emulator, an attacker must be able to insert a carefully crafted escape sequence into the terminal...

MGASA-2015-0442 Updated putty packages fix security vulnerability

Versions of PuTTY 0.54 and 0.65 inclusive have a potentially memory-corrupting integer overflow in the handling of the ECH erase characters control sequence in the terminal emulator CVE-2015-5309...