openssh: Machine-in-the-middle attack if VerifyHostKeyDNS is enabled

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. Fo...

Do Not Preset known_hosts for the SSH Service

knownhosts stores the public keys of the computers that the host has accessed. After a user successfully logs in to another computer, the public key information is automatically saved in $HOME/.ssh/knownhosts. When the same computer is accessed next time, its public key is verified. If the...

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin...

OESA-2025-1440 openssh security update

OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and...

OESA-2025-1439 openssh security update

OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and...

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin...

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin...

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin...

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin...

CVE-2025-42921

JetBrains Toolbox App has a CVE-2025-42921 vulnerability affecting versions prior to 2.6, caused by missing host key verification in the SSH plugin. Multiple connected sources corroborate that the SSH plugin’s host key verification is absent, enabling potential subversion of SSH authenticity. Aff...

PT-2025-17197 · Jetbrains · Jetbrains Toolbox App

Name of the Vulnerable Software and Affected Versions: JetBrains Toolbox App versions prior to 2.6 Description: The issue concerns missing host key verification in the SSH plugin. Recommendations: For versions prior to 2.6, update to version 2.6 or later to resolve the issue...

openssh: Machine-in-the-middle attack if VerifyHostKeyDNS is enabled

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. Fo...

EulerOS 2.0 SP11 : openssh (EulerOS-SA-2025-1367)

According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious...

OESA-2025-1314 openssh security update

OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and...

OESA-2025-1316 openssh security update

OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and...

OESA-2025-1315 openssh security update

OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and...

OESA-2025-1237 rust security update

Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety. This package includes the Rust compiler and documentation generator. Security Fixes: Cargo is a Rust package manager. The Rust Security Response WG was notified that Cargo did not...

Medium: openssh

Issue Overview: A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying...

Security update for openssh

This update for openssh fixes the following issues: Security issues fixed: CVE-2025-26465: Fixed a MitM attack against OpenSSH's VerifyHostKeyDNS-enabled client bsc1237040 CVE-2025-26466: Fixed a DoS attack against OpenSSH's client and server bsc1237041 Other issues fixed: Fix ssh client segfault...

The vulnerability of the VerifyHostKeyDNS component in the OpenSSH cryptographic security tool allows a attacker to perform XSS attacks.

The vulnerability of the VerifyHostKeyDNS component in the OpenSSH cryptographic security tool is related to errors in error handling during host key verification. Exploiting this vulnerability allows a remote attacker to perform XSS attacks...