Detection of Error Condition Without Action

Overview Affected versions of this package are vulnerable to Detection of Error Condition Without Action due to the mishandling of error codes when the VerifyHostKeyDNS option is enabled. An attacker can impersonate a legitimate server and potentially exhaust the client's memory resources by...

CVE-2025-26465 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...

CVE-2025-26465

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...

CVE-2025-26465 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...

CVE-2025-26465 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...

CVE-2025-26465

The CVE-2025-26465 issue affects OpenSSH when VerifyHostKeyDNS is enabled. A remote attacker could perform a MITM impersonation by abusing error-code handling during host-key verification, with success contingent on exhausting the client’s memory resources. Affected context is OpenSSH implementat...

CVE-2025-26465

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...

USN-7270-2: OpenSSH vulnerability

USN-7270-1 fixed a vulnerability in OpenSSH. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: It was discovered that the OpenSSH client incorrectly handled the non-default VerifyHostKeyDNS option. If that option were enabled, an...

USN-7270-2 openssh vulnerability

USN-7270-1 fixed a vulnerability in OpenSSH. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: It was discovered that the OpenSSH client incorrectly handled the non-default VerifyHostKeyDNS option. If that option were enabled, an...

USN-7270-1 openssh vulnerabilities

It was discovered that the OpenSSH client incorrectly handled the non-default VerifyHostKeyDNS option. If that option were enabled, an attacker could possibly impersonate a server by completely bypassing the server identity check. CVE-2025-26465 It was discovered that OpenSSH incorrectly handled...

CVE-2025-26465

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...

[SECURITY] [DSA 5868-1] openssh security update

------------------------------------------------------------------------- Debian Security Advisory DSA-5868-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso February 18, 2025 https://www.debian.org/security/faq -...

Qualys TRU Discovers Two Vulnerabilities in OpenSSH: CVE-2025-26465 & CVE-2025-26466

The Qualys Threat Research Unit TRU has identified two vulnerabilities in OpenSSH. The first, tracked as CVE-2025-26465, allows an active machine-in-the-middle attack on the OpenSSH client when the VerifyHostKeyDNS option is enabled. The second, CVE-2025-26466, affects both the OpenSSH client and...

CVE-2025-26465: Detection of Error Condition Without Action

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...

OpenSSH 9.9p1 Denial of Service / Man-In-The-Middle

OpenSSH versions 6.8p1 to 9.9p1 contain a logic error that allow an on-path attacker a.k.a man-in-the-middle to impersonate any server when the VerifyHostKeyDNS option is enabled. This option is off by default. OpenSSH versions 9.5p1 to 9.9p1 are vulnerable to a memory/CPU denial of service relat...

OpenSSH 9.9p1 Denial of Service / Man-In-The-Middle Vulnerability

OpenSSH versions 6.8p1 to 9.9p1 contain a logic error that allow an on-path attacker a.k.a man-in-the-middle to impersonate any server when the VerifyHostKeyDNS option is enabled. This option is off by default. OpenSSH versions 9.5p1 to 9.9p1 are vulnerable to a memory/CPU denial of service relat...

PT-2025-7168

Name of the Vulnerable Software and Affected Versions OpenSSH versions 6.8p1 through 9.9p1 Description A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled, allowing a machine-in-the-middle attack to be performed by a malicious machine impersonating a legitimate server...