Blog

XStream Multiple High-Risk Vulnerabilities Threat Alert

March 25, 2021 | Jie Ji

Vulnerability Description Recently, NSFOCUS detected that XStream released security advisories disclosing 11 security vulnerabilities in its products. An attacker could exploit these vulnerabilities to conduct DoS and SSRF attacks, delete arbitrary files, and lead to arbitrary RCE. XStream is a tool for converting between Java objects and XML. When serializing JavaBeans or deserializing XML files, […]

F5 BIG-IP/BIG-IQ High-Risk Vulnerabilities Threat Alert

March 24, 2021 | Jie Ji

Vulnerability Description On March 11, NSFOCUS observed that F5 released a security bulletin to announce the fix of multiple high-risk vulnerabilities, CVE-2021-22986, CVE-2021-22987, CVE-2021-22988, CVE-2021-22989, CVE-2021-22990, CVE-2021-22991, and CVE-2021-22992, which affect BIG-IP and BIG-IQ in F5. Users are advised to take preventive measures as soon as possible. BIG-IP is an F5 application delivery platform that […]

GitLab Remote Code Execution Vulnerability Threat Alert

March 22, 2021 | Jie Ji

Vulnerability Description On March 19, 2021, NSFOCUS detected that GitLab released patches for a code execution vulnerability in GitLab Community Edition (CE) and Enterprise Edition (EE), which was assigned a CVSS base score of 9.9. Unauthorized authenticated attackers could craft malicious requests via controllable markdown rendering options, thereby executing arbitrary code on the server. GitLab […]

Microsoft March Security Updates for Multiple High-Risk Product Vulnerabilities

March 18, 2021 | Jie Ji

Vulnerability Description On March 10, 2021, Beijing time, Microsoft released March 2021 Security Updates that fix 89 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, Internet Explorer, and Visual Studio. In these security updates, Microsoft fixes 14 critical […]

malware

‘FreakOut’ Malware Analysis – FreakOut Samples

March 16, 2021 | Jie Ji

Produced by: NSFOCUS Security Labs FreakOut samples appearing in the campaign were a typical IRC bot Trojan program written in Python. The Trojan program would connect to IRC channels in hardcoded C&C and act as instructed by C&C to collect information, launch DDoS attacks, interact with shells, and conduct ARP sniffing attacks. Also, it carried […]

malware

‘FreakOut’ Malware Analysis – Groups Behind FreakOut

March 15, 2021 | Jie Ji

Produced by: NSFOCUS Security Labs In early January 2021, NSFOCUS Security Labs captured an unknown malicious program called “out.py” via its real-time data platform, which is usually spread with the domain name “gxbrowser.net”. NSFOCUS Security Labs conducted an in-depth research on the samples and payloads of the malware and compared the malware with NSFOCUS threat […]

Numerous Bank Customers Getting Hooked on SMS Phishing

March 11, 2021 | Jie Ji

Event Overview Since February 2021, NSFOCUS’s emergency response team has found that several provinces in China saw multiple SMS phishing events using fake bank domain names. As these events bear a striking resemblance in the phishing playbook, attack means, and phishing website pages, we can largely determine that these attacks were launched by the same […]

Microsoft Exchange Server Multiple High-Risk Vulnerabilities

March 9, 2021 | Jie Ji

Vulnerability Description On March 2, NSFOCUS observed that Microsoft released emergency security updates to fix seven vulnerabilities in Exchange Server. Exchange server-side request forgery vulnerability (CVE-2021-26855): An unauthenticated attacker, via a crafted HTTP request, could exploit this vulnerability to scan the intranet and authenticate as Exchange Server. Exchange Server deserialization vulnerability (CVE-2021-26857): An attacker with […]

Apache Tomcat Session Deserialization Code Execution Vulnerability (CVE-2021-2532 9) Threat Alert

March 5, 2021 | Jie Ji

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 […]

VMware Multiple High-Risk Vulnerabilities

March 1, 2021 | Jie Ji

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 […]