Vulnerability Description On March 1, 2021, NSFOCUS observed that Apache Software Foundation (ASF) released a security bulletin to announce the fix of a remote code execution vulnerability via session persistence. This vulnerability is due to the bypass of the patch against CVE-2020-9484. If Tomcat’s session persistence function is used, its insecure configuration allows attackers to […]

Vulnerability Description On February 23, 2021, VMware released a security bulletin to announce the fix of two high-risk vulnerabilities in vSphere Client and ESXi. CVE-2021-21972: vSphere Client (HTML5) contains a remote code execution vulnerability in the vRealize Operations plug-in in vCenter Server, with the CVSSv3 score of 9.8. The affected vRealize Operations plug-in is installed […]

Just in February, another two amplification DDoS attacks caught our attention. They are respectively abusing Plex Media Servers and Powerhouse VPN servers to amplify junk traffic to victims. Abuse Plex Media Server for Amplification Attacks On 3rd February, according to ZDNet, DDoS-for-hire services have found a way to abuse Plex Media servers to bounce junk […]

Vulnerability Description On February 10, 2021, Beijing time, Microsoft released February 2021 Security Updates that fix 56 vulnerabilities, including high-risk ones like remote code execution and privilege escalation in various widely used products such as Microsoft Windows, Microsoft Office, Microsoft Exchange Server, Visual Studio, and Microsoft .NET Framework. In these security updates, Microsoft fixes 11 […]

Vulnerability Description On February 10, NSFOCUS found that Microsoft fixed the Windows TCP/IP remote code execution vulnerability (CVE-2021-24074) in its February updates. This vulnerability exists in the IPv4 source routing which is blocked by default in Windows systems. Attackers, via a crafted IP packet, could exploit this vulnerability to execute arbitrary code on a target […]

Regulatory Policies With years of development, the blockchain industry has taken shape, but enterprise blockchain applications are still at an exploratory stage. The blockchain ecosystem contains SPs, application vendors, and users. SPs in this context provide blockchain information services, whose compliancerequirements are surely different from those for other information services (such as cloud services) due […]

According to a survey, 25% of internal security incidents are attributed to information disclosure. Attackers, merely through information disclosure, without needing to resort to measures with obvious patterns, like password cracking, can further acquire sensitive information about users and enterprises. It should be noted that this kind of attack method has a high degree of […]

The enterprise-related blockchain security landscape has two layers of meanings: enterprise blockchain security situation and blockchain-related enterprise security situation. The former refers to the security posture of enterprises that have deployed blockchain applications. In the latter case, although an enterprise does not deploy any blockchain applications, security threats facing it point to blockchains. In terms […]

ICS security professionals should report ICS vulnerabilities to the vendor before attackers discover them and offer the vendor with remediation suggestions, mitigation measures, and security solutions to avoid network attack risks before the vulnerabilities are malicious exploited. Compared with Windows systems, a quite different method is used to assess ICS systems due to their heterogeneity. […]

This chapter analyzes security threats facing enterprise blockchains.