SLP: a new DDoS amplification vector in the wild
Earlier today, April 25, 2023, researchers Pedro Umbelino at Bitsight and Marco Lux at Curesec published their discovery of CVE-2023-29552, a new DDoS reflection/amplification attack vector leveraging the SLP protocol. If you are a Cloudflare customer, your services are already protected from this new attack vector.
Service Location Protocol (SLP) is a “service discovery” protocol invented by Sun Microsystems in 1997. Like other service discovery protocols, it was designed to allow devices in a local area network to interact without prior knowledge of each other. SLP is a relatively obsolete protocol and has mostly been supplanted by more modern alternatives like UPnP, mDNS/Zeroconf, and WS-Discovery. Nevertheless, many commercial products still offer support for SLP.
Since SLP has no method for authentication, it should never be exposed to the public Internet. However, Umbelino and Lux have discovered that upwards of 35,000 Internet endpoints have their devices’ SLP service exposed and accessible to anyone. Additionally, they have discovered that the UDP version of this protocol has an amplification factor of up to 2,200x, which is the third largest discovered to-date.
Cloudflare expects the prevalence of SLP-based DDoS attacks to rise significantly in the coming weeks as malicious actors learn how to exploit Continue reading
Why I joined Cloudflare as Chief Security Officer
I am absolutely thrilled and feel incredibly blessed to have joined Cloudflare as Chief Security Officer (CSO). Cybersecurity has always been my passion and focus of my career. I am grateful to join such a dynamic and innovative team. Cloudflare is a cybersecurity industry leader and offers unmatched technology that is second to none.
A little about me
I have been a CSO for over 20 years in the financial and private sectors with SVB, HSBC, McAfee, Ameren, and Scottrade. I have been privileged to lead the security teams of some of the world's largest, most complex, and most innovative companies; however, my greatest honor has been working with and collaborating among some of the world's most amazing people. I have learned my dedication, expertise, and passion from my leaders, peers, and teams, which have taught me how to build and lead world-class security programs that protect organizations from the most sophisticated threats. Because security is constantly evolving, the key is, and always will be, to build an active, diverse community of highly empathetic people that will successfully protect the organization.
My charter
As I step into my new role as CSO at Cloudflare, I am excited to take on Continue reading
Secure by default: recommendations from the CISA’s newest guide, and how Cloudflare follows these principles to keep you secure
When you buy a new house, you shouldn’t have to worry that everyone in the city can unlock your front door with a universal key before you change the lock. You also shouldn’t have to walk around the house with a screwdriver and tighten the window locks and back door so that intruders can’t pry them open. And you really shouldn’t have to take your alarm system offline every few months to apply critical software updates that the alarm vendor could have fixed with better software practices before they installed it.
Similarly, you shouldn’t have to worry that when you buy a network discovery tool it can be accessed by any attacker until you change the password, or that your expensive hardware-based firewalls can be recruited to launch DDoS attacks or run arbitrary code without the need to authenticate.
This “default secure” posture is the focus of a recently published guide jointly authored by the Cybersecurity and Infrastructure Agency (CISA), NSA, FBI, and six other international agencies representing the United Kingdom, Australia, Canada, Germany, Netherlands, and New Zealand. In the guide, the authors implore technology vendors to follow Secure-by-Design and Secure-by-Default principles, shifting the burden of security as much Continue reading
Learn How to Conquer Lateral Cybersecurity Risks at RSAC 2023
In a world without neatly defined network perimeters, lateral security—means detecting and mitigating threats from malicious actors who are already inside your network—is the new front in cybersecurity. To detect lateral threats, businesses need comprehensive visibility into what’s happening inside their IT estates, not just around them. They need to see every packet and every process at every endpoint.
At the upcoming RSA conference in San Franciso, we’ll be highlighting how VMware technologies like Project Northstar help organizations conquer lateral security threats. Keep reading for a sneak peek of what to expect from the VMware team at the event, and join us at RSA Conference from April 24-27 2023 at Moscone Center, North Expo Booth#5644 in San Francisco to check out the latest innovations in cloud networking and security for yourself.
Lateral Movement is the New Cyber Battleground
VMware security strategy consists of five key pillars, and we’ll be showing off all of them at the RSA Conference:
- Networking Security with NSX
- Carbon Black XDR
- Secure the Hybrid Workforce
- VMware SASE and SD-WAN
- Modern Apps Security
We’ll demonstrate these concepts at our booth by walking visitors through use cases and demos, allowing attendees to explore Lateral Security defense strategies Continue reading
Should I Care About RPKI and Internet Routing Security?
One of my subscribers sent me this question:
I’m being asked to enter a working group on RPKI and route origination. I’m doing research, listening to Jeff Tantsura, who seems optimistic about taking steps to improve BGP security vs Geoff Huston, who isn’t as optimistic. Should I recommend to the group that the application security is the better investment?
You need both. RPKI is slowly becoming the baseline of global routing hygiene (like washing hands, only virtual, and done once every blue moon when you get new IP address space or when the certificates expire). More and more Internet Service Providers (including many tier-1 providers) filter RPKI invalids thus preventing the worst cases of unintentional route leaks.
Should I Care About RPKI and Internet Routing Security?
One of my subscribers sent me this question:
I’m being asked to enter a working group on RPKI and route origination. I’m doing research, listening to Jeff Tantsura, who seems optimistic about taking steps to improve BGP security vs Geoff Huston, who isn’t as optimistic. Should I recommend to the group that the application security is the better investment?
You need both. RPKI is slowly becoming the baseline of global routing hygiene (like washing hands, only virtual, and done once every blue moon when you get new IP address space or when the certificates expire). More and more Internet Service Providers (including many tier-1 providers) filter RPKI invalids thus preventing the worst cases of unintentional route leaks.
Kubernetes Security And Networking 6: Kubernetes CVEs – Video
This video looks at various Kubernetes vulnerabilities and their severity scores to help you understand how to evaluate CVEs so you can prioritize remediation. It also shows different options and sources of CVEs. You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a diverse a mix of […]
The post Kubernetes Security And Networking 6: Kubernetes CVEs – Video appeared first on Packet Pushers.
Turning WiFi into a Thick Yellow Cable
The “beauty” (from an attacker perspective) of the original shared-media Ethernet was the ability to see all traffic sent to other hosts. While it’s trivial to steal someone else’s IPv4 address, the ability to see their traffic allowed you to hijack their TCP sessions without the victim being any wiser (apart from the obvious session timeout). Really smart attackers could go a step further, insert themselves into the forwarding path, and inject extra payload into unencrypted sessions.
A recently-discovered WiFi vulnerability brought us back to that wonderful world.
Turning WiFi into a Thick Yellow Cable
The “beauty” (from an attacker perspective) of the original shared-media Ethernet was the ability to see all traffic sent to other hosts. While it’s trivial to steal someone else’s IPv4 address, the ability to see their traffic allowed you to hijack their TCP sessions without the victim being any wiser (apart from the obvious session timeout). Really smart attackers could go a step further, insert themselves into the forwarding path, and inject extra payload into unencrypted sessions.
A recently-discovered WiFi vulnerability brought us back to that wonderful world.
Kubernetes Security And Networking 5: Installing A Service Mesh – Video
This video walks through installing a service mesh. We use Linkerd, but there are many other options. We show how to install Linkerd in your cluster and add sidecars to pods. You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a diverse a mix of content from […]
The post Kubernetes Security And Networking 5: Installing A Service Mesh – Video appeared first on Packet Pushers.
MAC Flooding Attack
Unlike a hub, a switch is a network device that typically does not forward a […]
The post MAC Flooding Attack first appeared on Brezular's Blog.
Ask JJX: Lynyrd Skynyrd Answers “Who Should Create an Org’s BYOD Policy?”
After LastPass's latest breach through a personal laptop, most boards, CIOs, and CISOs are taking the opportunity to reevaluate their Bring Your Own Device (BYOD) policies.
Here's how, why, and a lesson learned from Lynyrd Skynyrd.
The post Ask JJX: Lynyrd Skynyrd Answers “Who Should Create an Org’s BYOD Policy?” appeared first on Packet Pushers.
Helping protect personal information in the cloud, all across the world
Cloudflare has achieved a new EU Cloud Code of Conduct privacy validation, demonstrating GDPR compliance to strengthen trust in cloud services
Internet privacy laws around the globe differ, and in recent years there’s been much written about cross-border data transfers. Many regulations require adequate protections to be in place before personal information flows around the world, as with the European General Data Protection Regulation (GDPR). The law rightly sets a high bar for how organizations must carefully handle personal information, and in drafting the regulation lawmakers anticipated personal data crossing-borders: Chapter V of the regulation covers those transfers specifically.
Whilst transparency on where personal information is stored is important, it’s also critically important how personal information is handled, and how it is kept safe and secure. At Cloudflare, we believe in protecting the privacy of personal information across the world, and we give our customers the tools and the choice on how and where to process their data. Put simply, we require that data is handled and protected in the same, secure, and careful way, whether our customers choose to transfer data across the world, or for it to remain in one country.
And today we are proud to announce Continue reading
ChatGPT on BGP Routing Security
I wanted to include a few examples of BGP bugs causing widespread disruption in the Network Security Fallacies presentation. I tried to find what happened when someone announced beacon prefixes with unknown optional transitive attributes (which should have been passed without complaints but weren’t) without knowing when it happened or who did it.
Trying to find the answer on Google proved to be a Mission Impossible – regardless of how I structured my query, I got tons of results that seemed relevant to a subset of the search words but nowhere near what I was looking for. Maybe I would get luckier with a tool that’s supposed to have ingested all the world’s knowledge and seems to (according to overexcited claims) understand what it’s talking about.
ChatGPT on BGP Routing Security
I wanted to include a few examples of BGP bugs causing widespread disruption in the Network Security Fallacies presentation. I tried to find what happened when someone announced beacon prefixes with unknown optional transitive attributes (which should have been passed without complaints but weren’t) without knowing when it happened or who did it.
Trying to find the answer on Google proved to be a Mission Impossible – regardless of how I structured my query, I got tons of results that seemed relevant to a subset of the search words but nowhere near what I was looking for. Maybe I would get luckier with a tool that’s supposed to have ingested all the world’s knowledge and seems to (according to overexcited claims) understand what it’s talking about.
DDoS DNS attacks are old-school, unsophisticated … and they’re back
SPONSORED: Ransomware may currently be the biggest bogeyman for cybersecurity pros, law enforcement, and governments, but it shouldn’t divert us from more traditional, but still very disruptive threats. …
DDoS DNS attacks are old-school, unsophisticated … and they’re back was written by Martin Courtney at The Next Platform.