Blockchains are distributed digital ledgers of cryptographically signed transactions that are grouped into blocks. Each block is cryptographically linked to the previous one (making it tamper evident) after validation and undergoing a consensus decision. As new blocks are added, older blocks become more difficult to modify (creating tamper resistance). New blocks are replicated across copies […]
The outbreak of Incaseformat virus has affected many industries recently. It is critical because it has removed all non-system files and caused serious data loss. This virus appeared before, now it has come back and infected many hosts, especially in China. As of 14 Jan, 2:00 P.M.(GMT+8), NSFOCUS Labs and NSFOCUS Threat Intelligence have detected […]
The following sections analyze threats from the port mapping service based on UPnP port mapping tables collected from network-wide devices. Overview In the 2018 Annual IoT Security Report , we focused our attention on four types of malicious port mappings that had the most distinctive characteristics and the most extensive impact. Of the four major […]
Overview Recently, Apache Flink announced two directory traversal vulnerabilities, CVE-2020-17518 and CVE-2020-17519. Currently, Apache Flink has released a new version to fix the preceding vulnerability. Affected users are advised to upgrade as soon as possible.
Overview On December 14, 2020, Beijing time, FireEye posted a blog on a SolarWinds supply chain attack. The blog shows that SolarWinds software was trojanized by attackers around March 2020 and suffered a severe supply chain attack. Currently, SolarWinds has released relevant updates. Users are advised to install the updates immediately.
Overview On December 8, 2020, FireEye, a cybersecurity company, posted a blog stating that its internal network was attacked by a sophisticated organization and that FireEye Red Team tools were stolen. According to FireEye, the stolen Red Team tools were mainly used to provide its customers with basic penetration testing services and did not contain […]
In the 2018 Annual IoT Security Report, we analyzed threats against UPnP and you can refer to the report for basics of UPnP. In this report, we updated UPnP-related data and added new findings. Viewpoint 6: Approximately 2.28 million IoT devices around the world had the UPnP/SSDP service (port 1900) publicly accessible and therefore were […]
Overview Microsoft disclosed a remote code execution vulnerability (CVE-2020-17144) Microsoft Exchange Server 2010 in its latest December security updates, rating the vulnerability as Important. The vulnerability exists because the program improperly verifies cmdlet parameters. An authenticated attacker could exploit this vulnerability to cause remote code execution. This vulnerability is similar to CVE-2020-0688 and requires login […]
Overview On December 8, 2020, local time, OpenSSL released a security advisory disclosing a NULL pointer dereference vulnerability (CVE-2020-1971), rating the vulnerability as High-risk. The vulnerability exists in the GENERAL_NAME_cmp function in OpenSSL. GENERAL_NAME_cmp compares different instances of a GENERAL_NAME to see if they are equal or not. When both GENERAL_NAMEs contain EDIPartyName, a NULL […]
Overview On December 8, 2020, Struts released a security bulletin disclosing a potential remote code execution vulnerability (CVE-2020-17530) in S2-061. The vulnerability stems from insufficient input validation. This results in two forced Object Graph Navigation Library (OGNL) evaluations when the original user input is calculated. When the OGNL expression is forced in Struts tag attributes […]