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Nov 22, 2021
Microsoft Exchange Vulnerability - CVE-2021-42321
THE THREAT eSentire has identified publicly available Proof-of-Concept (PoC) exploit code, for the critical Microsoft Exchange vulnerability CVE-2021-42321. CVE-2021-42321 was announced as part of Microsoft’s November Patch Tuesday release. Exploitation would allow a remote threat actor, with previous authentication, to execute code on vulnerable servers. Prior to the patch release, Microsoft…
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Oct 28, 2021
Telarus and eSentire Expand Partnership to Safeguard Enterprises Globally Against Business Disrupting Ransomware and Zero-Day Attacks
London, UK and Sydney, Australia– Oct. 28, 2021 - eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announces the expansion of its partnership with Telarus, the largest privately-held distributor of business cloud infrastructure and contact centre services. Building on their mutual success across North America, Telarus will bring eSentire’s Managed…
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Security advisories — Sep 28, 2021

UPDATE: Critical VMware vCenter Vulnerability

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THE THREAT

UPDATE: Exploitation of CVE-2021-22005 has been identified in the wild. Fully functional Proof-of-Concept (PoC) exploit code for CVE-2021-22005 was publicly released on September 27th. The release of PoC code is expected to result in widespread exploitation of the vulnerability in the immediate future. Organizations need to ensure that either the VMware security patches, or temporary mitigations are applied immediately to prevent exploitation.

On September 21st, VMware announced a critical vulnerability impacting VMware vCenter servers. The vulnerability is a file upload vulnerability tracked as CVE-2021-22005 (CVSS: 9.8). Exploitation would allow a threat actor to execute remote code on vulnerable systems by uploading a specially crafted malicious file. Previous authentication is not required for exploitation.

Organizations are strongly recommended to apply the relevant security patch as soon as possible.

What we’re doing about it

What you should do about it

Additional information

CVE-2021-22005 impacts vCenter Server 6.7 and 7.0. Exploitation requires that a vulnerable version of vCenter be accessible over port 443. CVE-2021-22005 is considered trivial to exploit and would provide significant access to threat actors; these factors increase the likelihood that threat actors will focus on this vulnerability and attempt to exploit it before organizations have widely deployed patches.

In addition to CVE-2021-22005, VMware addressed 18 other vulnerabilities. These vulnerabilities are not considered critical but should be addressed with the available security patches.

References:

[1] https://us-cert.cisa.gov/ncas/current-activity/2021/09/24/vmware-vcenter-server-vulnerability-cve-2021-22005-under-active
[2] https://blogs.vmware.com/vsphere/2021/09/vmsa-2021-0020-what-you-need-to-know.html
[3] https://kb.vmware.com/s/article/85717
[4] https://www.vmware.com/security/advisories/VMSA-2021-0020.html

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