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May 11, 2022
CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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Waterloo, ON, May 17, 2022 — eSentire, the Authority in Managed Detection and Response (MDR), maintains one of the most secure and robust IT environments of any MDR provider in the industry. To that end, eSentire today announced that it has received the Payment Card Industry Data Security Standard (PCI DSS) certification, considered one of the most stringent and comprehensive payment card…
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Security advisories — Oct 14, 2020

Patch Tuesday Priority Vulnerabilities

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THE THREAT

On October 13th, 2020, Microsoft released its Patch Tuesday vulnerability list, addressing 87 security issues. Two critical vulnerabilities from this release are especially concerning. CVE-2020-16898, also known as Bad Neighbor, is a remote code execution vulnerability affecting multiple versions of Windows 10 and Windows Server 2019 [1]. This vulnerability received the highest criticality rating of all Microsoft vulnerabilities for the month of October (9.8/10), and Microsoft has stated that exploitation is considered likely.

CVE-2020-16952 is a remote code execution vulnerability affecting multiple versions of Microsoft SharePoint Server [2]. Proof of Concept (PoC) exploit code for this vulnerability emerged on the evening of October 13th. eSentire expects exploitation by threat actors in the immediate future due to the availability of a PoC exploit code.

Organizations are strongly encouraged to apply the applicable Microsoft patches as soon as possible.

What we’re doing about it

What you should do about it

Additional information

CVE-2020-16898 is due to a failure that takes place when TCP/IP stack handles ICMPv6 Router Advertisement packets. Exploitation of the vulnerability would allow a threat actor to execute remote code on vulnerable servers. This vulnerability is especially concerning as it is wormable, meaning that threat actors could craft an exploit that automatically spreads between vulnerable Windows devices.

CVE-2020-16952 is due to a failure by SharePoint to check the source markup of an application package. Successful exploitation would allow a remote threat actor to execute code in the context of the SharePoint application pool/server farm account. Authentication is required in order to exploit this vulnerability [3]. CVE-2020-16952 was rated Exploitation Less Likely by Microsoft, but this is likely to change due to the public release of PoC exploit code.

Exploitation in the wild has not been identified for either of the vulnerabilities mentioned in this advisory.

CVE-2020-16898 Affected Products:

CVE-2020-16952 Affected Products:

References:

[1] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898

[2] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16952

[3] https://srcincite.io/advisories/src-2020-0022/

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