Security News
Jack Wallen shows you an easy way to determine if your Linux server is under a DDoS attack and how to quickly stop it. How? In this piece I'm going to show you a few commands that can help you discern if your server is being hit by a denial of service attack, which comes from a single IP address and attempts to cripple a website to render its server inaccessible.
U.S. DHS Cybersecurity and Infrastructure Security Agency has warned admins to upgrade their vulnerable OpenSSL instances immediately. OpenSSL advisory states, one place where the GENERAL NAME cmp function is used is when OpenSSL validates a certificate's CRL distribution point field.
A high-severity flaw in Cisco's IOS XR software could allow unauthenticated, remote attackers to cripple Cisco Aggregation Services Routers. The flaw stems from Cisco IOS XR, a train of Cisco Systems' widely deployed Internetworking Operating System.
"The Cisco Product Security Incident Response Team is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory," according to Cisco in an update released on Wednesday. The most severe of these flaws includes a vulnerability in Cisco Firepower Chassis Manager, which exists in the Firepower Extensible Operating System and provides management capabilities.
UPDATE. A critical security bug in the SonicWall VPN portal can be used to crash the device and prevent users from connecting to corporate resources. "The most notable aspect of this vulnerability is that the VPN portal can be exploited without knowing a username or password," Young told Threatpost.
Cisco Talos this week released the details of several remotely exploitable denial-of-service vulnerabilities found by one of its researchers in an industrial automation product made by Rockwell Automation. Cisco Talos and Rockwell Automation say a total of five high-severity buffer overflow vulnerabilities have been identified.
If you have an NGINX site that must allow users to upload files, try this configuration to help prevent possible Denial-of-Service attacks.
Palo Alto Networks this week announced that it has patched critical and high-severity denial-of-service and arbitrary code execution vulnerabilities in its PAN-OS firewall software. Another potentially serious vulnerability, classified as high severity and tracked as CVE-2020-2041, allows a remote, unauthenticated attacker to get all PAN-OS services to enter a DoS condition by causing the device to restart and enter maintenance mode.
If you have an NGINX site that must allow users to upload files, try this configuration to help prevent possible Denial-of-Service attacks. Out of the box, NGINX sets a limit of 1MB for file uploads.
Cisco recently patched the high-severity flaw, which could allow remote, unauthenticated attackers to launch DoS attacks against its popular small business switches. Cisco is warning of a high-severity flaw that could allow remote, unauthenticated attackers to cripple several of its popular small-business switches with denial of service attacks.