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Only one critical vulnerability included in May’s Microsoft Patch Tuesday; One other zero-day in DWN Core

Only one critical vulnerability included in May’s Microsoft Patch Tuesday; One other zero-day in DWN Core

After a relatively hefty Microsoft Patch Tuesday in April, this month’s security update from the company only included one critical vulnerability across its massive suite of products and services.Β Β 

In all, May’s slate of vulnerabilities disclosed by Microsoft included 59 total CVEs, most of which are considered to be of β€œimportant” severity. There is only one moderate-severity vulnerability.Β 

The lone critical security issue is CVE-2024-30044, a remote code execution vulnerability in SharePoint Server. An authenticated attacker who obtains Site Owner permissions or higher could exploit this vulnerability by uploading a specially crafted file to the targeted SharePoint Server. Then, they must craft specialized API requests to trigger the deserialization of that file’s parameters, potentially leading to remote code execution in the context of the SharePoint Server.Β 

The Windows Mobile Broadband Driver also contains multiple remote code execution vulnerabilities:Β 

However, to successfully exploit this issue, an adversary would need to physically connect a compromised USB device to the victim's machine.Β 

Microsoft also disclosed a zero-day vulnerability in the Windows DWM Core Library, CVE-2024-30051. Desktop Window Manager (DWM) is a Windows operating system service that enables visual effects on the desktop and manages things like transitions between windows.Β Β Β 

An adversary could exploit CVE-2024-30051 to gain SYSTEM-level privileges.Β Β 

This vulnerability is classified as having a β€œlow” level of attack complexity, and exploitation of this vulnerability has already been detected in the wild.Β Β 

One other issue, CVE-2024-30046, has already been disclosed prior to Patch Tuesday, but has not yet been exploited in the wild. This is a denial-of-service vulnerability in ASP.NET, a web application framework commonly used in Windows.Β Β 

Microsoft considers this vulnerability β€œless likely” to be exploited, as successful exploitation would require an adversary to spend a significant amount of time repeating exploitation attempts by sending constant or intermittent data to the targeted machine.Β Β Β 

A complete list of all the other vulnerabilities Microsoft disclosed this month is available on its update page.Β 

In response to these vulnerability disclosures, Talos is releasing a new Snort rule set that detects attempts to exploit some of them. Please note that additional rules may be released at a future date and current rules are subject to change pending additional information. Cisco Security Firewall customers should use the latest update to their ruleset by updating their SRU. Open-source Snort Subscriber Rule Set customers can stay up to date by downloading the latest rule pack available for purchase on Snort.org.Β Β 

The rules included in this release that protect against the exploitation of many of these vulnerabilities are 63419, 63420, 63422 - 63432, 63444 and 63445. There are also Snort 3 rules 300906 - 300912.

Talos joins CISA to counter cyber threats against non-profits, activists and other at-risk communities

Talos joins CISA to counter cyber threats against non-profits, activists and other at-risk communities

Cisco Talos is delighted to share updates about our ongoing partnership with the U.S. Cybersecurity and Infrastructure Security Agency (CISA) to combat cybersecurity threats facing civil society organizations.

Talos has partnered with CISA on several initiatives through the Joint Cyber Defense Collaborative (JCDC), including sharing intelligence on strategic threats of interest.

Adversaries are leveraging advancements in technology and the interconnectedness of the world’s networks to undermine democratic values and interests by targeting high-risk communities within civil society. According to CISA, these communities include activists, journalists, academics and organizations engaged in advocacy and humanitarian causes. Consequently, the U.S. government has elevated efforts in recent years to counter cyber threats that have placed the democratic freedoms of organizations and individuals at heightened risk.

The JCDC’s High-Risk Community Protection (HRCP) initiative is one such measure that brings together government, technology companies, and civil society organizations to strengthen the security of entities at heightened risk of cyber threat targeting and transnational repression.

The HRCP initiative’s outputs β€” including a threat mitigation guideΒ for civil society, operational best practices, and online resources for communities at risk β€” aim to counter the threats posed by state-sponsored advanced persistent threats (APTs) and, increasingly, private-sector offensive actors (PSOA).

Our ongoing partnership with CISA and contributions to the JCDC’s HRCP initiative are consistent with Cisco’s security mission to protect data, systems, and networks, and uphold and respect the human rights of all.

Spyware threats persist despite government and private sector measures

As we’ve written about, the use of commercially available spyware to target high-profile or at-risk individuals and organizations is a global problem. This software can often track targets’ exact location, steal their messages and personal information, or even listen in on phone calls. Private companies, commonly referred to as β€œPSOAs” or β€œcyber mercenaries,” have monetized the development of these offensive tools, selling their spyware to any government willing to pay regardless of the buyer's intended use.

Commercial spyware tools can threaten democratic values by enabling governments to conduct covert surveillance on citizens, undermining privacy rights and freedom of expression. Lacking any international laws or norms around the use of commercial spyware, this surveillance can lead to the suppression of dissent, erosion of trust in democratic institutions, and consolidation of power in the hands of authoritarian governments.

The U.S. and its partners have taken steps to curb the proliferation of these dangerous tools. These include executive orders banning the use of certain spyware by U.S. government agencies, export restrictions and sanctions on companies or individuals involved in the development and sale of spyware (such as the recent sanctioning of members of the Intellexa Commercial Spyware Consortium), and diplomatic efforts with international partners and allies to pressure countries that harbor or support such firms.

Private industry has also played a substantial role in countering this threat, including by publishing research and publicly attributing PSOAs and countries involved in digital repression. Some companies have also developed countersurveillance technologies (such as Apple’s Lockdown Mode) to protect high-risk users and have initiated legal challenges through lawsuits against PSOAs alleging privacy violations. In March 2023, Cisco proudly became principal co-author of the Cybersecurity Tech Accord principles limiting offensive operations in cyberspace, joining several technology partners in calling for industry-wide principles to counter PSOAs.

Talos intelligence fuels HRCP threat mitigation guide for civil society

Talos has tracked the evolution of the commercial spyware industry and APT targeting of high-risk industries, placing us in a strong position to contribute our knowledge to the HRCP effort. Our research on two key threat actors β€” the Intellexa Commercial Spyware Consortium and the China state-sponsored Mustang Panda group β€” informed the HRCP guide’s overview of tactics commonly used against high-risk communities.

Talos has closely monitored threats stemming from the Intellexa Consortium, an umbrella group of organizations and individuals that offer commercial spyware tools to global customers, including authoritarian governments. In May 2023, we conducted a technical analysis of Intellaxa’s flagship PREDATOR spyware which was initially developed by a PSOA known as Cytrox. Our research specifically looked at two components of Intellexa's mobile spyware suite known as β€œALIEN” and β€œPREDATOR,” which compose the backbone of the organization’s implant.

Our findings included an in-depth walkthrough of the infection chain, including the implant’s various information-stealing capabilities and evasion techniques. Over time, we learned more about Intellexa’s inner workings, including their spyware development timelines, product offerings, operating paradigms and procedures.

Our research on Mustang Panda also contributed to the mitigation guide by illustrating how government-sponsored threat actors have targeted civil society organizations with their own signature tools and techniques. This APT is heavily focused on political espionage and has targeted non-governmental organizations (NGOs), religious institutions, think tanks, and activist groups worldwide. Mustang Panda commonly sends spear phishing emails using enticing lures to gain access to victim networks and install custom implants, such as PlugX, that enable device control and user monitoring. The group has continuously evolved its delivery mechanisms and payloads to ensure long-term uninterrupted access, underscoring the threat posed to civil society and others.

What is next for this growing threat?

Threat actors with ties to Russia, China, and Iran have primarily been responsible for this heightened threat activity, according to industry reporting. But the threat is not limited to them. Last year, a U.K. National Cyber Security Centre (NCSC) estimate found that at least 80 countries have purchased commercial spyware, highlighting how the proliferation of these tools enables even more actors to join the playing field.

Yet we are staying ahead of the game. Talos researchers are continuously identifying the latest trends in threat actor targeting which include not only the use of commercial spyware but other tools and techniques identified in the HRCP guide, such as spear phishing and trojanized applications. Our intelligence powers Cisco’s security portfolio, ensuring customer safety.

Talos created a reporting resource where individuals or organizations suspected of being infected with commercial spyware can contact Talos’ research team ([email protected]) to assist in furthering the community’s knowledge of these threats.

We are determined to continue our work with CISA, other agencies, and industry leaders, leveraging the power of partnerships to protect Cisco customers and strengthen community resilience against common adversaries.

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