Fedora: Security Advisory (FEDORA-2025-d936540ef5)

The remote host is missing an update for the 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...

FlatPress <= 1.4.1 Multiple Vulnerabilities

FlatPress is prone to multiple vulnerabilities. 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 = "cpe:/a:flatpress:flatpress"; ifdescripti...

SUSE: Security Advisory (SUSE-SU-2025:03310-1)

The remote host is missing an update for the 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...

SUSE: Security Advisory (SUSE-SU-2025:03301-1)

The remote host is missing an update for the 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-4309-1)

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...

SUSE: Security Advisory (SUSE-SU-2025:03345-1)

The remote host is missing an update for the 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...

openSUSE Security Advisory (SUSE-SU-2025:03300-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7770-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7764-1)

The remote host is missing an update for the 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...

openSUSE Security Advisory (SUSE-SU-2025:03301-1)

The remote host is missing an update for the 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...

Disable PermitUserEnvironment

PermitUserEnvironment allows users to set SSH environment variables, which may be exploited by attackers to launch attacks. If PermitUserEnvironment is set to yes, attackers can modify SSH environment variables to evade the security mechanism or execute attack code. This configuration must be...

Ensure That Scripts Writable by Low-Privilege Users Cannot Be Configured in the sudoers Configuration File

The sudo command enables a specified common user to execute certain programs with the root permission. The corresponding configuration file is /etc/sudoers. The administrator can configure rules to enable some scripts or binary files to run with the root permission. Therefore, only the root user...

Microsoft PC Manager Security Feature Bypass Vulnerability (Sep 2025) - Windows

Microsoft PC Manager is prone to a security feature bypass 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 =...

openSUSE Security Advisory (SUSE-SU-2025:03307-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7755-3)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7769-2)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7768-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7765-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7771-1)

The remote host is missing an update for the 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...

SUSE: Security Advisory (SUSE-SU-2025:03344-1)

The remote host is missing an update for the 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...

SUSE: Security Advisory (SUSE-SU-2025:03300-1)

The remote host is missing an update for the 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...

Ubuntu: Security Advisory (USN-7769-1)

The remote host is missing an update for the 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 (DSA-6010-1)

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...

Ubuntu: Security Advisory (USN-7772-1)

The remote host is missing an update for the 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...

openSUSE Security Advisory (SUSE-SU-2025:03309-1)

The remote host is missing an update for the 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...

SUSE: Security Advisory (SUSE-SU-2025:03348-1)

The remote host is missing an update for the 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...

Configure Proper Policies for INPUT of iptables

The INPUT chain is used to filter packets received from external systems. For any service provided for external systems, configure the corresponding INPUT policy and enable the related port so that external clients can access the service through the port. If the policy is not set, all packets tha...

Do Not Preset authorized_keys for the SSH Service

authorizedkeys specifies the public key of the remote host. You can store the public key in the $HOME/.ssh/authorizedkeys file in the home directory for public key authentication. Then you can directly log in to the system. If authorizedkeys is preset in the system and public and private key...

Ensure That the su Command Is Restricted

The su command enables a common user to have the permissions of the superuser or other users. It is often used for switching the user from a common user to the root user. The su command provides a convenient way for users to change their identities. However, if the su command is run without...

Ensure That the su Command Inherits the User Environment Variables Without Escalating Privileges

The su command enables a common user to have the permissions of the superuser or other users. It is often used for switching the user from a common user to the root user. The su command provides a convenient way for users to change their identities. However, if the su command is run without...

Configure a Proper Number of Concurrent Sessions Allowed for a Single SSH Connection

SSH allows a client that supports multiplexing to establish multiple sessions based on a network connection. MaxSessions limits the number of concurrent SSH sessions that can be established for each network connection. This prevents system resources from being occupied by a single connection or a...

Fedora: Security Advisory (FEDORA-2025-fcc043d407)

The remote host is missing an update for the 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...

Fedora: Security Advisory (FEDORA-2025-88ec28aaee)

The remote host is missing an update for the 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...

Do Not Install the rsync Service

The rsync service can synchronize data between servers or between local drive partitions. However, information leakage risks exist because rsync uses non-encrypted transmission protocols. If the rsync service is enabled and data is transmitted between servers over the network, attackers can...

Configure Proper Association Policies for INPUT and OUTPUT of iptables

Although you can configure protocols, IP addresses, and port numbers to add policies for packets entering and leaving a server to the INPUT and OUTPUT chains, it is difficult to configure suitable policies using the sport parameter due to complicated situations. For example, a client accesses the...

Avoid Using the root User to Access the System Locally

Users with the root permission can access all Linux resources. If the root user is used to log in to the Linux OS to perform operations, there are many potential security risks. To avoid the risks, do not use the root user to log in to the Linux OS. If necessary, indirectly use the root user...

Configure a Proper Value for LoginGraceTime

LoginGraceTime is used to limit the login time of a user. If a user does not complete the login within the time specified by LoginGraceTime, the connection is automatically disconnected. You are advised to set this field to a value less than or equal to 60, in seconds. If this field is set to a...

Configure a Proper Value for MaxAuthTries

MaxAuthTries indicates the maximum number of user authentication failures allowed in a single connection. If the number of user authentication failures exceeds the value, the connection is automatically disconnected. You are advised to set this field to a value less than or equal to 3. If this...

Do Not Install Python 2

The EOL for Python 2 was reached on January 1, 2020, and there will be no updates and maintenance. If you continue to use Python 2, the system attack surface may be expanded, and system vulnerabilities and attack risks may increase. Therefore, do not use Python 2. If Python is required, you are...

Ensure That a Common User Cannot Use pkexec for Privilege Escalation

The pkexec command enables a common user to have the permissions of the superuser or other users. After the authentication is successful, the common user runs the corresponding program with the permissions of the superuser. The pkexec command provides a convenient way for users to change their...

Do Not Use X11 Forwarding

The X11 forwarding function of SSH allows the GUI program of the remote host to be executed on the local host. If the X11 forwarding function is enabled, the attack surface is expanded and other users on the X11 server may attack the local host. If the function is not required in the service...

Do Not Install the Avahi Service

Avahi is a zero-configuration networking implementation, including a system for multicast DNS/DNS-SD service discovery and automatic broadcast. For example, you can connect a server to the network and use Avahi to automatically broadcast network services running on the server for other user to...

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...

Do Not Start the debug-shell Service

The debug-shell service is used to locate faults that occur during system boot. This service is installed with systemd. The debug-shell service requires no authentication, that is, attackers can access the root shell by simply pressing Ctrl+Alt+F9 during systemd startup when the OS is booting. Th...

Configure the iptables Policies for Loopback Properly

The loopback address 127.0.0.0/8 is a special address on a server. It is irrelevant to NICs and is mainly used for the inter-process communication of a local device. Packets with the source address 127.0.0.0/8 from NICs should be discarded. If policies related to the loopback address are improper...

Configure Proper Policies for OUTPUT of iptables

There are two occasions in which a server sends outgoing packets: 1. The local host process proactively connects to an external server, for example, performing an HTTP access, or sending data to a log server. 2. The local host responds to the external access to the local services. If no policy is...

Configure the Default Policies of iptables to DROP Properly

Generally, iptables policies can be configured in allowlist or blocklist mode. You are advised to configure iptables policies in allowlist mode. Connections that do not comply with the rules in the allowlist are prohibited. Therefore, you can configure the DROP or REJECT policy for the INPUT,...

Avoid Using Programs Labeled unconfined_service_t

The purpose of setting the unconfinedservicet label for SELinux is to enable some third-party service processes not configured with SELinux policies to run without restrictions. By default, when systemd runs a third-party application whose label is bint or usrt generally located in directories su...

Do Not Configure Deprecated Options for the SSH Service

Currently, the SSH service communication protocols are classified into the first generation and the second generation. The configuration options of the SSH service of different versions are incompatible. In addition, the configuration options of some earlier versions are deprecated in the new...

Disable the TCP Forwarding Function of SSH

Setting AllowTcpForwarding to no disables the SSH client from performing TCP port forwarding. TCP port forwarding is a function of transmitting data between a local host and a remote host through an SSH tunnel. By disabling this function, you can restrict the data transmission and access scope of...