Security News

Microsoft has reminded admins that Exchange Server 2013 is reaching its extended end-of-support date in 60 days, on April 11, 2023. The first version of Exchange Server 2013 was released in January 2013, and it reached its mainstream end date four years ago, in April 2018.

Thousands of unpatched VMware ESXi servers hit by ransomware via old bugLate last week, unknown attackers launched a widespread ransomware attack hitting VMware ESXi hypervisors via CVE-2021-21974, an easily exploitable vulnerability that allows them to run exploit code remotely, without prior authentication. Reddit breached: Internal docs, dashboards, systems accessedPopular social news website and forum Reddit has been breached and the attacker "Gained access to some internal docs, code, as well as some internal dashboards and business systems," but apparently not to primary production systems and user data.

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Late last week, unknown attackers launched a widespread ransomware attack hitting VMware ESXi hypervisors via CVE-2021-21974, an easily exploitable vulnerability that allows them to run exploit code remotely, without prior authentication. Patches for CVE-2021-21974, a vulnerability in ESXi's OpenSLP service, have been provided by VMware two years ago, and this attack has revealed just how many servers are out there are still unpatched, with the SLP service still running and the OpenSLP port still exposed.

Royal Ransomware is the latest ransomware operation to add support for encrypting Linux devices to its most recent malware variants, specifically targeting VMware ESXi virtual machines. The new Linux Royal Ransomware variant was discovered by Will Thomas of the Equinix Threat Analysis Center, and is executed using the command line.

VMware ESXi hypervisors are the target of a new wave of attacks designed to deploy ransomware on compromised systems. "A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution," the virtualization services provider noted.

A sneaky botnet dubbed HeadCrab that uses bespoke malware to mine for Monero has infected at least 1,200 Redis servers in the last 18 months. "The victims seem to have little in common, but the attacker seems to mainly target Redis servers and has a deep understanding and expertise in Redis modules and APIs as demonstrated by the malware," Asaf Eitani and Nitzan Yaakov reported.

Admins, hosting providers, and the French Computer Emergency Response Team warn that attackers actively target VMware ESXi servers unpatched against a two-year-old remote code execution vulnerability to deploy ransomware. "As current investigations, these attack campaigns appear to be exploiting the vulnerability CVE-2021-21974, for which a patch has been available since 23 February 2021," CERT-FR said.

The developers of the GoAnywhere MFT file transfer solution are warning customers of zero-day remote code execution vulnerability on exposed administrator consoles. GoAnywhere is a secure web file transfer solution that allows companies to securely transfer encrypted files with their partners while keeping detailed audit logs of who accessed the files.

Australian software maker Atlassian has released patches for CVE-2023-22501, a critical authentication vulnerability in Jira Service Management Server and Data Center, and is urging users to upgrade quickly. "Installing a fixed version of Jira Service Management is the recommended way to remediate this vulnerability. If you are unable to immediately upgrade Jira Service Management, you can manually upgrade the version-specific servicedesk-variable-substitution-plugin JAR file as a temporary workaround," they advised.