Our security teams work around the clock to help protect every person and organization on the planet from security threats. We also know that security is a team sport, and that’s why we also partner with the global security community through our bug bounty programs to proactively identify and mitigate potential issues before our customers are impacted.

Our security teams work around the clock to help protect every person and organization on the planet from security threats. We also know that security is a team sport, and that’s why we also partner with the global security community through our bug bounty programs to proactively identify and mitigate potential issues before our customers are impacted. Unique perspectives from the brightest security minds add another layer to our overall strategy to protect our ecosystem. By incentivizing high-impact research, we raise the security bar for everyone.  

Today, we are building on that history of partnership and expanding our bug bounty programs with the Zero Day Quest. This new hacking event will be the largest of its kind, with an additional $4 million in potential awards for research into high-impact areas, specifically cloud and AI. Zero Day Quest will provide new opportunities for the security community to work hand in hand with Microsoft engineers and security researchers – bringing together the best minds in security to share, learn, and build community as we work to keep everyone safe.  

The quest begins today with a research challenge, where vulnerability submissions within targeted scenarios during the event are eligible for multiplied bounty awards. Submissions can also qualify researchers for a spot in the onsite hacking event in Redmond, WA, in 2025.  

To advance AI security, starting today we will offer double AI bounty awards. We will also offer researchers direct access to the Microsoft AI engineers focused on developing secure AI solutions, and our AI Red Team. This unique opportunity will allow participants to enhance their skills with cutting-edge tools and techniques and work with Microsoft to raise the bar for AI security across the ecosystem – making everyone safer. Register for a training session with the Microsoft AI Red Team today.  

In alignment with our Coordinated Vulnerability Disclosure (CVD) approach, researchers will be encouraged to publicly discuss their findings once mitigated, with support from Microsoft through blogs, podcasts, and videos to ensure we can all learn and build on this work. As part of our Secure Future Initiative (SFI), we will transparently share critical vulnerabilities through the Common Vulnerabilities and Exposures (CVE) program, even if they require no customer action. Learnings from the Zero Day Quest will be shared across Microsoft to help improve cloud and AI security - by default, by design, and in operations.  

This event is not just about finding vulnerabilities; it’s about fostering new and deepening existing partnerships between the Microsoft Security Response Center (MSRC), product teams, and external researchers – raising the security bar for all. Join us in this exciting journey as we push the boundaries of cybersecurity and work together to create a safer digital world.

_Tom Gallagher_  
_VP of Engineering, Microsoft Security Response Center (MSRC)_

Securing AI and Cloud with the Zero Day Quest

Freshly released court documents reveal new details on controversial Israeli spyware firm's operations.

Source: Shubham singh 007 via Shutterstock

Israel's NSO Group may know a lot more about how customers use its Pegasus commercial spyware product than the company has let on, newly released court documents connected to a legal dispute with Meta's WhatsApp suggest.

In fact, NSO Group installed and operated the spyware on behalf of its customers, making the company directly liable for the spyware's use, WhatsApp lawyers said in one court filing, released Nov. 14 in the US District Court for the Northern District of California.

The court documents are part of a lawsuit that WhatsApp filed against NSO Group in October 2019 after discovering the Israeli firm had used WhatsApp servers to distribute Pegasus to some 1,400 mobile phones, including those belonging to journalists and rights activists.

The lawyers also claimed that NSO Group repeatedly developed and used exploits for abusing WhatsApp's servers to install Pegasus on target devices, including at least once after WhatsApp had sued the company over the issue.

**NSO 'Solely Responsible'**

"NSO is solely responsible for Pegasus’s unauthorized access to WhatsApp's servers," the social media giant noted in one briefing. "Despite what NSO has claimed, its customers had a minimal role in how the spyware tool operated or collected information. All that NSO Group customers typically had to do was enter their target's phone number, press install and wait for the malware to install on the target device without any further interaction," they noted.

Related:Trustwave-Cybereason Merger Boosts MDR Portfolio

"In other words, the customer simply places an order for a target device's data, and NSO controls every aspect of the data retrieval and delivery process through its design of Pegasus," WhatsApp's lawyers said. The company, in fact, was so aware of how customers were using its malware that it actually disconnected service to 10 customers for excessive abuse, the lawyers claimed.

**Controversial Surveillance Software**

Pegasus is a controversial mobile spyware designed to secretly monitor and extract data from iOS and Android smartphones. Once installed, Pegasus can intercept messages, emails, media, and passwords, and track location data, all while evading detection by antivirus software. NSO Group claims to sell the technology solely to authorized government agencies for legitimate law enforcement, crime-fighting, and anti-terror purposes. But critics argue that the tool has been misused, particularly in authoritarian regimes, to target journalists, human rights activists, political dissidents, and others critical of the government.  

Related:Xiphera & Crypto Quantique Announce Partnership

A 2021 database leak revealed that NSO Group customers had, at the time, targeted more than 50,000 phone numbers for surveillance in countries like Mexico, Hungary, and India. The US government formally blacklisted the company in 2021, meaning its ability to operate in the US or do business with US entities abroad is severely restricted.

The NSO Group has tried to get US courts to dismiss WhatsApp's lawsuit against the company, citing, among other things, a lack of jurisdiction and the fact that its clients are mostly governments and therefore are not doing anything illegal. WhatsApp lawyers have sought to portray NSO Group as indeed being liable for Pegasus by attempting to tie the vendor more directly to customer use of the spyware tool.

In the newly released court documents, WhatsApp has alleged that NSO Group repeatedly and deliberated worked around the mechanisms the company put in place to prevent misuse of the secure messaging platform. One of them was a modified WhatsApp client app called the WhatsApp Installation Server (WIS) that could access WhatsApp's back-end servers in ways its own client software could not. NSO Group then developed tools named Heaven and Eden to interact with WIS in such a way as to trigger Pegasus downloads on target phones via WhatsApp. The company developed Eden after WhatsApp discovered Heaven and put up blocks against it. When WhatsApp engineers discovered Eden, NSO developed and used yet another tool, called Erised, through 2020, or after WhatsApp had filed its lawsuit.

Related:North Korea's Andariel Pivots to 'Play' Ransomware Games

The WhatsApp lawsuit is one of several that NSO Group is currently battling in courts worldwide from organizations and individuals impacted by the malware. In September, Apple sought voluntary dismissal of a 2021 lawsuit it had filed against NSO Group, citing concerns over the company having to share information with the court that other spyware makers could abuse going forward.

Back when the lawsuit was filed, the NSO Group was among a handful of known purveyors of such mobile spyware software. Since then, there has been a sharp increase in the number of commercial spyware vendors, driven largely by demand from government agencies. A Google report earlier this year identified spyware vendors like NSO Group as being responsible for nearly half of all zero-day exploits it counted between mid-2014 and December 2023.

**About the Author**

Jai Vijayan is a seasoned technology reporter with over 20 years of experience in IT trade journalism. He was most recently a Senior Editor at Computerworld, where he covered information security and data privacy issues for the publication. Over the course of his 20-year career at Computerworld, Jai also covered a variety of other technology topics, including big data, Hadoop, Internet of Things, e-voting, and data analytics. Prior to Computerworld, Jai covered technology issues for The Economic Times in Bangalore, India. Jai has a Master's degree in Statistics and lives in Naperville, Ill.

WhatsApp: NSO Group Operates Pegasus Spyware for Customers

PRESS RELEASE

SAN FRANCISCO, Nov. 4, 2024 /PRNewswire/ -- Bugcrowd, the leader in crowdsourced security, today announced the addition of Trey Ford as Chief Information Security Officer for the Americas, to the leadership team.

Trey is a seasoned strategic advisor and security thought leader with over 25 years of experience in offensive and defensive security disciplines. Trey has held key leadership roles at Deepwatch, Vista Equity Partners, Salesforce, Black Hat, and more. He has also been a valued member of Bugcrowd's advisory board for over a decade.

Trey is passionate about working with enterprise leaders, corporate directors, and investors to help teams strengthen their technology and execution strategy.

"I'm really looking forward to joining this amazing Bugcrowd team and this fast-growing, dynamic organization that continues to execute on its compelling vision for the future of cybersecurity, based on the ingenuity of the crowd," Ford said. "I've always believed in taking a hands-on approach to building, breaking, and deconstructing security problems to first principles -- I intend to continue applying that same mindset here at Bugcrowd."

"Trey's addition to our team marks a pivotal moment for enhancing our operational capabilities in the Americas region," said Nick McKenzie, Chief Information and Security Officer of Bugcrowd. "His leadership and offensive security expertise, coupled with his ability to help us connect with and support customers, will elevate the team's capabilities to new heights—a timely appointment with our current business momentum."

Bugcrowd also announced the availability of Bugcrowd Continuous Attack Surface Pentesting as a Service Subscription, a new way to consume pen testing. By using this subscription model, customers can enjoy the flexibility and predictability of pre-paid capacity on the Bugcrowd Platform to be drawn-down on demand.

In addition, Bugcrowd announced an additional growth capital facility of $50 million from Silicon Valley Bank in October. The new financing will further scale Bugcrowd's AI-powered platform globally, fund continued innovation into the Bugcrowd Platform, and leverage opportunities for strategic M&A, providing added value to clients, partners, and the hacker community.

"We are extremely excited by the rapid growth and market momentum that Bugcrowd has achieved so far this year," said Dave Gerry, Chief Executive Officer of Bugcrowd. "We believe we are putting together the world's strongest combination of people and technologies to deliver on the powerful insights provided by elite hackers operating on our global Platform."

The Bugcrowd Platform connects organizations with trusted security researchers and hackers to help proactively defend themselves against sophisticated threats. For over a decade, Bugcrowd's unique "skills-as-a-service" approach has uncovered more high-impact vulnerabilities than traditional methods, along with clearer ROI, for more than 1,200 customers – including OpenAI, Google, T-Mobile, Carvana, the US Department of Defense's Chief Digital and Artificial Intelligence Office (CDAO), ExpressVPN, Rapyd, New Relic, and OpenSea. With unmatched flexibility and access to a decade of vulnerability intelligence, the Bugcrowd Platform has evolved to address a changing attack surface influenced by adoption of mobile infrastructure, hybrid work, APIs, crypto, cloud workloads, and AI. Bugcrowd's crowdsourced solutions include penetration-testing-as-a-service, managed bug bounties, vulnerability disclosure programs (VDPs), and AI Safety and Security products.

To learn more about how the Bugcrowd platform can help your organization fight against today's evolving cyberattacks, visit here.

To download a copy of the Inside the Mind of a Hacker 2024 report, click here.

About Bugcrowd

We are Bugcrowd. Since 2012, we've been empowering organizations to take back control and stay ahead of threat actors by uniting the collective ingenuity and expertise of our customers and trusted alliance of elite hackers, with our patented data and AI-powered Security Knowledge Platform™. Our network of hackers brings diverse expertise to uncover hidden weaknesses, adapting swiftly to evolving threats, even against zero-day exploits. With unmatched scalability and adaptability, our data and AI-driven CrowdMatch™ technology in our platform finds the perfect talent for your unique fight. We are creating a new era of modern crowdsourced security that outpaces threat actors.

Unleash the ingenuity of the hacker community with Bugcrowd, visit www.bugcrowd.com. Read our blog.

Bugcrowd Names Trey Ford as CISO

The security vendor's Expedition firewall appliance's PAN-OS interface tool has racked up four critical security vulnerabilities under active attack in November, leading tit to advise customers to update immediately or and take them off the Internet.

Source: tofino via Alamy Stock Photo

Palo Alto Networks (PAN) put out an advisory Friday warning its customers that a critical, unauthenticated remote code execution (RCE) bug is under exploit by cybercriminals in its Expedition firewall interface — making this the tool's fourth vulnerability under active attack identified in just the past week.

PAN's Expedition firewall management is a utility the vendor uses to transition its new customers from their previous system to PAN-OS. For the latest bug, it issued a critical security bulletin warning about fresh threat activity targeting an unauthenticated remote command injection vulnerability (CVE-2024-0012, CVSS 9.3) in Expedition. The company didn't specify exactly when it became aware of the zero-day, but it issued patches today for the bug, which arises from a missing authentication check.

"Palo Alto Networks has observed threat activity exploiting an unauthenticated remote command execution vulnerability against a limited number of firewall management interfaces which are exposed to the Internet," Palo Alto Network's security bulletin said.

The day prior to the PAN bulletin, on Thursday, Nov. 14, CISA added two separate, critical Expedition flaws disclosed Nov. 8 to its Known Exploited Vulnerabilities Catalog: an OS command injection vulnerability (CVE-2024-9463) with a CVSS score of 9.9; and an SQL injection vulnerability (CVE-2024-9465) with a CVSS score of 9.2. And just a week before, another PAN Expedition vulnerability, a missing authentication bug disclosed July 10, made the KEV list (CVE-2024-5910).

Related:Dark Reading Confidential: Meet the Ransomware Negotiators

**How to Secure an Exposed Expedition Firewall Management System**

Customers should patch their systems as soon as possible; and the vendor urges Expedition users to ensure their systems are not reachable from the public Internet.

And although most of these impacted firewalls already follow that best practice, PAN recommends that customers, "immediately ensure that access to the management interface is possible only from a trusted internal IPs and not from the Internet."

According to the ShadowServer Foundation's IoT device tracking statistics, on Nov. 14 there were more than 8,700 instances of PAN-OS Management systems connected to the Internet and vulnerable to these exploits. That number is down from around 11,000 observed prior to PAN's Nov. 8 bulletin.

"The security of our customers is our highest priority, and we have been in daily contact with customers who we have identified as at heightened risk," a statement from PAN provided to Dark Reading said. "We recently became aware of malicious activity targeting a small number of firewalls that we believe had a management interface exposed to the Internet. This vulnerability could potentially result in unauthorized access to these specific firewalls. We are actively monitoring the situation and are committed to providing our customers with the support they need to stay secure."

Related:Akira Ransomware Racks Up 30+ Victims in a Single Day

The company added that Prisma Access and Cloud NGFW are not believed to be impacted.

Experts urge cybersecurity teams not to underestimate the risk of leaving these vulnerabilities exposed.

“OS commanding and SQL injection are among the most critical vulnerabilities in software," says Ray Kelly, a cybersecurity expert with Black Duck. "When both vectors exist in a single product, it essentially exposes the application completely. These vulnerabilities have been known for decades and can be easily detected using most modern Web application scanning tools.”

Last summer, PAN announced Expedition is being phased out and will no longer be supported as of January 2025.

Palo Alto Networks Patches Critical Zero-Day Firewall Bug

Palo Alto Networks has released new indicators of compromise (IoCs) a day after the network security vendor confirmed that a new zero-day vulnerability impacting its PAN-OS firewall management interface has been actively exploited in the wild.
To that end, the company said it observed malicious activity originating from below IP addresses and targeting PAN-OS management web interface IP

PAN-OS Firewall Vulnerability Under Active Exploitation – IoCs Released

A threat actor known as BrazenBamboo has exploited an unresolved security flaw in Fortinet's FortiClient for Windows to extract VPN credentials as part of a modular framework called DEEPDATA.
Volexity, which disclosed the findings Friday, said it identified the zero-day exploitation of the credential disclosure vulnerability in July 2024, describing BrazenBamboo as the developer behind DEEPDATA,

Warning: DEEPDATA Malware Exploiting Unpatched Fortinet Flaw to Steal VPN Credentials

According to Mozilla, users have a lot more power to manipulate ChatGPT than they might realize. OpenAI hopes those manipulations remain within a clearly delineated sandbox.

Source: mundissima via Alamy Stock Photo

ChatGPT exposes significant data pertaining to its instructions, history, and the files it runs on, placing public GPTs at risk of sensitive data exposure, and raising questions about OpenAI's security on the whole.

The world's leading AI chatbot is more malleable and multifunctional than most people realize. With some specific prompt engineering, users can execute commands almost like one would in a shell, upload and manage files as they would in an operating system, and access the inner workings of the large language model (LLM) it runs on: the data, instructions, and configurations that influence its outputs.

OpenAI argues that this is all by design, but Marco Figueroa, a generative AI (GenAI) bug-bounty programs manager at Mozilla who has uncovered prompt-injection concerns before in ChatGPT, disagrees.

"They're not documented features," he says. "I think this is a pure design flaw. It's a matter of time until something happens, and some zero-day is found," by virtue of the data leakage.

**Prompt Injection: What ChatGPT Will Tell You**

Figueroa didn't set out to expose the guts of ChatGPT. "I wanted to refactor some Python code, and I stumbled upon this," he recalls. When he asked the model to refactor his code, it returned an unexpected response: directory not found. "That's odd, right? It's like a \[glitch in\] the Matrix."

Related:Microsoft Pulls Exchange Patches Amid Mail Flow Issues

Was ChatGPT processing his request using more than just its general understanding of programming? Was there some kind of file system hidden underneath it? After some brainstorming, he thought of a follow-up prompt that might help elucidate the matter: "list files /", an English translation of the Linux command "ls /".

In response, ChatGPT provided a list of its files and directories: common Linux ones like "bin", "dev", "tmp", "sys", etc. Evidently, Figueroa says, ChatGPT runs on the Linux distribution "Debian Bookworm," within a containerized environment.

By probing the bot's internal file system — and in particular, the directory "/home/sandbox/.openai\_internal/" — he discovered that besides just observing, he could also upload files, verify their location, move them around, and execute them.

**OpenAI Access: Feature or Flaw?**

In a certain light, all of this added visibility and functionality is a positive — offering even more ways for users to customize and level up how they use ChatGPT, and enhancing OpenAI's reputation for transparency and trustworthiness.

Indeed, the risk that a user could really do anything malicious here — say, upload and execute a malicious Python script — is softened by the fact that ChatGPT runs in a sandboxed environment. Anything a user can do will, in theory, be limited only to their specific environment, strictly cordoned off from any of OpenAI's broader infrastructure and most sensitive data.

Related:Trump 2.0 May Mean Fewer Cybersecurity Regs, Shift in Threats

Figueroa warns, though, that the extent of information ChatGPT leaks via prompt injection might one day help hackers find zero-day vulnerabilities, and break out of their sandboxes. "The reason why I stumbled onto everything I did was because of an error. This is what hackers do \[to find bugs\]," he says. And if trial and error doesn't work for them, he adds, "the LLM could assist you in figuring out how to get through it."

In an email to Dark Reading, a representative of OpenAI reaffirmed that it does not consider any of this a vulnerability, or otherwise unexpected behavior, and claimed that there were "technical inaccuracies" in Figueroa's research. Dark Reading has followed up for more specific information.

**The More Immediate Risk: Reverse-Engineering**

There is one risk here, however, that isn't so abstract.

Besides standard Linux files, ChatGPT also allows its users to access and extract much more actionable information. With the right prompts, they can unearth its internal instructions — the rules and guidelines that shape the model's behavior. And even deeper down, they can access its knowledge data: the foundational structure and guidelines that define how the model "thinks," and interacts with users.

Related:Cloud Ransomware Flexes Fresh Scripts Against Web Apps

On one hand, users might be grateful to have such a clear view into how ChatGPT operates, including how it handles safety and ethical concerns. On the other hand, this insight could potentially help bad actors reverse engineer those guardrails, and better engineer malicious prompts.

Worse still is what this means for the millions of custom GPTs available in the ChatGPT store today. Users have designed custom ChatGPT models with focuses in programming, security, research, and more, and the instructions and data that gives them their particular flavor is accessible to anyone who feeds them the right prompts.

"People have put secure data and information from their organizations into these GPTs, thinking it's not available to everyone. I think that is an issue, because it's not explicitly clear that your data potentially could be accessed," Figueroa says.

In an email to Dark Reading, an OpenAI representative pointed to GPT Builder documentation, which warns developers about the risk: "Don't include information you do not want the user to know" it reads, and flags its user interface, which warns, "if you upload files under Knowledge, conversations with your GPT may include file contents. Files can be downloaded when Code Interpreter is enabled."

**About the Author**

Nate Nelson is a freelance writer based in New York City. Formerly a reporter at Threatpost, he contributes to a number of cybersecurity blogs and podcasts. He writes "Malicious Life" -- an award-winning Top 20 tech podcast on Apple and Spotify -- and hosts every other episode, featuring interviews with leading voices in security. He also co-hosts "The Industrial Security Podcast," the most popular show in its field.

ChatGPT Exposes Its Instructions, Knowledge &amp; OS Files

Cloud service providers are getting better at protecting data, pushing adversaries to develop new cloud ransomware scripts to target PHP applications, a new report says.

Instead of solely leaning on leaky buckets and cloud service provider (CSP) vulnerabilities to exfiltrate sensitive data, a fresh crop of cloud-targeting ransomware is aimed instead at exploiting unprotected Web applications to drop encryptors and lock up victims' data.

The pivot to focusing on PHP applications demonstrates the success that CSPs have had in shoring up their environments with policies like AWS's Key Management Service, according to a new report from SentinelOne on the state of cloud ransomware landscape in 2024. CSPs can now ensure that almost no data is really lost, thanks to policies that require a waiting period and confirmation before data can be deleted. There are some fairly exotic malicious workarounds for some of these protections, but attacks can easily be blocked by implementing service control policies, the report said.

**Cloud Ransomware's New Look at Web Applications**

Cloud ransomware operators have started to mine Web applications for opportunities in increasing volumes, according to SentinelOne.

"Web applications are often run via cloud services," SentinelOne's report explained. "Their more minimal nature makes cloud environments a natural hosting point where the applications are easier to manage and require less configuration and upkeep than running on a full operating system. However, Web applications themselves are vulnerable to extortion attacks."

Related:5 Ways to Save Your Organization From Cloud Security Threats

Analysis uncovered new ransomware scripts specifically developed to attack PHP applications — such as a Python script named "Pandora," and another attributed to Indonesian-based threat actor IndoSec group.

"The Pandora script uses AES encryption to target several types of systems, including PHP servers, Android, and Linux," the report added. "The PHP ransom functions encrypt files using AES via the OpenSSL library. The Pandora Python script runs on the Web server, writing the PHP code output to the path pandora/Ransomware with a file name provided as an argument at runtime and appended with the php extension."

The ransom script targeting PHP applications developed by IndoSec uses a PHP backdoor to manage and delete files, according to the report. It searches through directories, reads, and then encodes the file contents using a Web service's API.

"This is an interesting approach because the encryption is provided through a remote service, rather than using native functionality like many other tools," the report noted.

**Using Legitimate Cloud-Native Functions to Steal Data**

Aside from trying to breach them, adversaries have also figured out how to use these cloud services themselves to exfiltrate stolen data, the report explained. SentinelOne offers the example of September Rhysdia and BianLian cloud ransomware attacks that abandoned their historical exfiltration tools like MEGAsync and rclone, and instead used Azure Storage Explorer to download the data. The following month, the LockBit ransomware group was discovered using Amazon's S3 storage to exfiltrate data from Windows and macOS systems, SentinelOne added.

Related:Google AI Platform Bugs Leak Proprietary Enterprise LLMs

In keeping with the trend, the SentinelOne research identified a new Python script on VirusTotal it named "RansomES." This code is designed to infiltrate a Windows system, look for files with extensions that indicate the file contains data, including .doc, .xls, .jpg, .png, or .txt. Once those files have been identified, the RansomES code allows the ransomware attacker to exfiltrate those files to an S3 storage bucket or an FTP site, and encrypt the local versions.

"RansomES is a simple script, and we do not believe it has been used in the wild," the report noted. "The author included an Internet connectivity check to the WannaCry killswitch domain, which may suggest the script was developed by a researcher or someone with an interest in threat intelligence."

Related:2 Zero-Day Bugs in Microsoft's Nov. Update Under Active Exploit

The key to protecting data against Web application cloud ransomware attacks is to assess the overall cloud environment to protect against misconfigurations and overly permissive storage buckets, the report concluded.

"Additionally, always enforce good identity management practices such as requiring MFA on all admin accounts, and deploy runtime protection against all cloud workloads and resources," according to SentinelOne.

Cloud Ransomware Flexes Fresh Scripts Against Web Apps

A newly patched security flaw impacting Windows NT LAN Manager (NTLM) was exploited as a zero-day by a suspected Russia-linked actor as part of cyber attacks targeting Ukraine.
The vulnerability in question, CVE-2024-43451 (CVSS score: 6.5), refers to an NTLM hash disclosure spoofing vulnerability that could be exploited to steal a user's NTLMv2 hash. It was patched by Microsoft earlier this

Russian Hackers Exploit New NTLM Flaw to Deploy RAT Malware via Phishing Emails

Among the top exploited zero-day vulnerabilities were bugs found in systems from Citrix and Cisco.

Source: JUN LI via Alamy Stock Photo

The Cybersecurity and Infrastructure Security Agency is warning that the most routinely exploited vulnerabilities in 2023 were zero-days in its latest research conducted alongside global cybersecurity authorities.

These findings are a reversal from 2022, when less than half of the most exploited vulnerabilities were zero-days.

CISA's "2023 Top Routinely Exploited Vulnerabilities" report shows that threat actors continue to have success exploiting these kinds of vulnerabilities even two years after public disclosure. After this time frame, the value of the vulnerability tends to decline as patches get applied and systems are replaced.

Some of the top zero-day flaws came from vendors such as Citrix and Cisco, with vulnerabilities involving code injection bugs (CVE-2024-3519), privilege escalation (CVE-2023-20198), and buffer overflow (CVE-2023-4966).

To combat exploitation from threat actors, CISA is urging organizations to check for signs of compromise and keep up with patching CVEs. However, even this may not be enough. Three other tools that CISA recommends are endpoint detection and response (EDR), Web application firewalls, and network protocol analyzers. 

As to why zero-days were among the top exploited, many individuals in the cybersecurity community argued that it's because the quality of software is getting worse.

Others argue that it's because cybercriminals are focusing less on sharing proof-of-concepts (PoC) on forums and more on reserving knowledge about vulnerabilities in-house.

Regardless, CISA provides a variety of mitigation resources for end users and organizations to combat these threats in its study, highlighting identity and access management, protective controls and architecture, and supply chain security.

Tag

#zero_day