Debian dsa-5868 : openssh-client - security update

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5868 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-5868-1 [email protected] https://www.debian.org/security/...

UBUNTU-CVE-2025-26466

A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to ...

DLA-4057-1 openssh - security update

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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...

OpenSSH: Multiple Vulnerabilities

Background OpenSSH is a free application suite consisting of server and clients that replace tools like telnet, rlogin, rcp and ftp with more secure versions offering additional functionality. Description Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers...

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...

DSA-5868-1 openssh - security update

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Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : OpenSSH vulnerabilities (USN-7270-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7270-1 advisory. It was discovered that the OpenSSH client incorrectly handled the non-default VerifyHostKeyDNS option. If that option wer...

GLSA-202502-01 : OpenSSH: Multiple Vulnerabilities

The remote host is affected by the vulnerability described in GLSA-202502-01 OpenSSH: Multiple Vulnerabilities Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details. Tenable has extracted the preceding description block directly...

OPENSUSE-SU-2025:14820-1 openssh-9.9p2-1.1 on GA media

These are all security issues fixed in the openssh-9.9p2-1.1 package on the GA media of openSUSE Tumbleweed...

UBUNTU-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...

OpenBSD OpenSSH 6.8p1 - 9.9p1 MitM Vulnerability

OpenBSD OpenSSH is prone to a man-in-the-middle MitM vulnerability. SPDX-FileCopyrightText: 2025 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 CPE =...

Debian: Security Advisory (DSA-5868-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2025 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...

Debian: Security Advisory (DLA-4057-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2025 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...

OpenBSD OpenSSH 9.5p1 - 9.9p1 DoS Vulnerability

OpenBSD OpenSSH is prone to a denial of service DoS vulnerability. SPDX-FileCopyrightText: 2025 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 CPE =...

Slackware Linux 15.0 / current openssh Multiple Vulnerabilities (SSA:2025-049-01)

The version of openssh installed on the remote host is prior to 9.9p2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-049-01 advisory. New openssh packages are available for Slackware 15.0 and -current to fix security issues. Tenable has extracted the precedi...

Debian dla-4057 : openssh-client - security update

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4057 advisory. ------------------------------------------------------------------------- Debian LTS Advisory DLA-4057-1 [email protected] https://www.debian.org/lts/security/...

Ubuntu 16.04 LTS / 18.04 LTS : OpenSSH vulnerability (USN-7270-2)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-7270-2 advisory. USN-7270-1 fixed a vulnerability in OpenSSH. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Tenable has...

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...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the sshpacketreadpollseqnr function in packet.c. Ping packets SSH2MSGPING received without authentication buffer but neither send nor free PONG responses, which can consume unlimit...