Configure TIME_WAIT for TCP

TIMEWAIT indicates the time for TCP to wait for connection destruction. If this parameter is set to a large value, a large number of TCP connections are not closed and DoS attacks occur. You are advised to set this parameter to a value less than or equal to 60. SPDX-FileCopyrightText: 2025...

Enable TCP-SYN Cookie Protection

TCP-SYN cookie protection mitigates the impact of SYN flood attacks on the system. When an attacker launches a SYN flood attack, the half-open connection queue in the kernel is quickly exhausted to block valid connections. If SYN cookie is enabled, the system can still accept valid connections ev...

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...

Configure Proper Policies for INPUT of nftables

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...

Disable tcp_timestamps

tcptimestamps is used to record the time when TCP data packets are sent. It can be used for RTT measurement RTTM and protection against wrapped sequence number PAWS. It is a bidirectional option and takes effect only when it is enabled on both the client and server. If this option is enabled, the...

CVE-2025-37730

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle MitM attack in “client” mode, as hostname verification in TCP output was not being performed when the sslverificationmode = full was set...

CVE-2025-37730 Logstash Improper Certificate Validation in TCP output

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle MitM attack in “client” mode, as hostname verification in TCP output was not being performed when the sslverificationmode = full was set...

CVE-2025-37730 Logstash Improper Certificate Validation in TCP output

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle MitM attack in “client” mode, as hostname verification in TCP output was not being performed when the sslverificationmode = full was set...

CVE-2025-37730

CVE-2025-37730 concerns improper certificate validation in Logstash’s TCP output, enabling MitM in “client” mode due to hostname verification not occurring when ssl_verification_mode is set to full. Affected component is the Logstash TCP output plugin (logstash-output-tcp). The root cause is lack...

kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

An unchecked buffer bounds flaw was found in the Linux kernel's NVMe TCP Fabrics driver. An attacker with the ability to send a crafted packet to an affected NVMe host could exploit this flaw to alter kernel memory, leading to an escalation of privileges or a compromise of system integrity or...

kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

An unchecked buffer bounds flaw was found in the Linux kernel's NVMe TCP Fabrics driver. An attacker with the ability to send a crafted packet to an affected NVMe host could exploit this flaw to alter kernel memory, leading to an escalation of privileges or a compromise of system integrity or...

Important: Red Hat Security Advisory: kpatch-patch-5_14_0-503_15_1 and kpatch-patch-5_14_0-503_26_1 security update

An update for kpatch-patch-5140-503151 and kpatch-patch-5140-503261 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity...

kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

An unchecked buffer bounds flaw was found in the Linux kernel's NVMe TCP Fabrics driver. An attacker with the ability to send a crafted packet to an affected NVMe host could exploit this flaw to alter kernel memory, leading to an escalation of privileges or a compromise of system integrity or...

Important: Red Hat Security Advisory: kpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 security update

An update for kpatch-patch-5140-427131, kpatch-patch-5140-427311, kpatch-patch-5140-427441, and kpatch-patch-5140-427551 is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common...

kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

An unchecked buffer bounds flaw was found in the Linux kernel's NVMe TCP Fabrics driver. An attacker with the ability to send a crafted packet to an affected NVMe host could exploit this flaw to alter kernel memory, leading to an escalation of privileges or a compromise of system integrity or...

kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

An unchecked buffer bounds flaw was found in the Linux kernel's NVMe TCP Fabrics driver. An attacker with the ability to send a crafted packet to an affected NVMe host could exploit this flaw to alter kernel memory, leading to an escalation of privileges or a compromise of system integrity or...

CVE-2025-25504

An issue in the /usr/local/bin/jncs.sh script of Gefen WebFWC In AV over IP products v1.85h, v1.86v, and v1.70 allows attackers with network access to connect to the device over TCP port 4444 without authentication and execute arbitrary commands with root privileges...

SUSE CVE-2022-49775

In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcpcdgrelease to be called multiple times Apparently, mptcp is able to call tcpdisconnect on an already disconnected flow. This is generally fine, unless current congestion control is CDG, because it might trigger...

PT-2025-19713

Name of the Vulnerable Software and Affected Versions Gefen WebFWC In AV over IP products versions 1.70, 1.85h, 1.86v Description An issue in the /usr/local/bin/jncs.sh script allows attackers with network access to connect to the device over TCP port 4444 without authentication and execute...

NetScaler RDP proxy -14.1- How to configure RDP proxy with RDS server

This article explains how to configure an RDP Proxy Gateway with an RDS server. Key Points to Note: -If you are using an RDS server, you will need an RDP server profile where the RDP IP is set as the RDS server IP. -For the RDP Host, enter the FQDN of the Gateway Virtual Server. This is required...