OpenSSH vulnerability

CVE-2025-26465 is a medium-severity vulnerability (CVSS 6.8) in OpenSSH that enables a Man-in-the-Middle (MitM) attack by exploiting a flaw in the VerifyHostKeyDNS option.

When enabled, this feature allows an attacker to impersonate a legitimate SSH server, potentially hijacking user sessions and intercepting sensitive data.

The vulnerability affects OpenSSH versions 6.8p1 to 9.9p1 and was particularly concerning for systems running FreeBSD, where the option was enabled by default from 2013 to 2023.

The flaw stems from a logic error that mishandles host key verification, allowing attackers to bypass security checks, gain unauthorized access, and inject malicious commands into SSH sessions​

Organizations relying on OpenSSH for secure communications should take immediate steps to mitigate this risk. OpenSSH 9.9p2 contains a patch addressing the issue, and users should upgrade as soon as possible. If upgrading is not feasible, a recommended workaround is to disable the VerifyHostKeyDNS option unless absolutely necessary and manually verify SSH key fingerprints before establishing connections. Given that a Proof of Concept (PoC) exploit is already publicly available, delaying mitigation could expose systems to exploitation​

Boosting Productivity with SLNet’s Multi-Tasking Engine

Efficiency and productivity are key to any organization’s growth. SLNet, with its robust multi-tasking engine, is designed to optimize your operations by allowing unlimited Telnet sessions on a single server. Here’s how it benefits your organization:

1. Scalability

SLNet supports unlimited Telnet sessions, making it ideal for businesses of all sizes. Whether you’re a small startup or a large enterprise, SLNet scales with your needs, ensuring seamless connectivity for all your RF devices.

2. Enhanced Productivity

By allowing multiple sessions to run concurrently, SLNet eliminates the bottlenecks typically associated with limited connectivity. Employees can perform multiple tasks simultaneously without experiencing downtime, leading to increased overall productivity.

3. Resource Efficiency

SLNet’s multi-tasking engine is designed to optimize CPU usage, ensuring that even with numerous active sessions, your server’s performance remains uncompromised. This efficient use of resources helps maintain system stability and reliability.

4. Flexibility and Integration

SLNet easily integrates with various Windows applications, providing a versatile solution that adapts to your existing IT infrastructure. This flexibility allows for smoother operations and a more cohesive workflow.

5. Reliability

With SLNet, you can count on consistent performance and reliable connectivity. Its robust architecture ensures that your Telnet sessions remain stable and uninterrupted, critical for operations where downtime is not an option.

6. Security

While productivity is crucial, so is security. SLNet’s multi-tasking capabilities do not compromise on security, allowing you to manage and monitor multiple sessions securely.

Conclusion

SLNet’s multi-tasking engine is a game-changer for organizations seeking to enhance their connectivity and productivity. By supporting unlimited Telnet sessions and optimizing server performance, SLNet provides a reliable, scalable, and efficient solution for modern businesses.

For more details and to explore how SLNet can benefit your organization, visit SeattleLab.

Maximizing Productivity with SLNet: The Power of Multi-User Telnet Sessions

Maximizing productivity is essential for maintaining a competitive edge in today’s dynamic and fast-paced business environment. SLNet, developed by SeattleLab, is a powerful Telnet server solution designed to enhance operational efficiency by enabling unlimited concurrent Telnet sessions on a single server.

This capability, driven by SLNet’s advanced multi-tasking engine, allows businesses to optimize their server resources, facilitating seamless communication and data exchange across numerous devices.

Key Benefits of SLNet:

 

Unlimited Telnet Sessions: SLNet supports an unlimited number of simultaneous Telnet connections, making it an ideal solution for organizations of any size. Whether managing a small team or a global network, SLNet ensures that all users can connect and operate without any performance bottlenecks.

 

High-Performance Multi-Tasking Engine: The core of SLNet’s power lies in its multi-tasking engine, which efficiently manages server resources. This engine enables multiple processes to run concurrently without slowing down the system, ensuring that every Telnet session operates smoothly.

 

Broad Compatibility: SLNet is compatible with all Telnet clients and supports a wide range of character sets, including ANSI VT100/VT220 and UTF-8. This broad compatibility ensures that SLNet can be integrated into various environments, supporting different devices and applications seamlessly.

 

Scalability: As businesses grow, so do their operational demands. SLNet is designed with scalability in mind, allowing organizations to expand their Telnet usage without worrying about server overload or decreased performance.

 

Optimized Resource Utilization: SLNet’s asynchronous, multi-threaded architecture is designed to minimize CPU usage, thereby optimizing server performance. This ensures that even with a high number of concurrent users, the system remains responsive and efficient.

 

Future-Proof Operations: SLNet supports Windows Server versions from 2016 onwards, ensuring that your Telnet server infrastructure remains robust and up-to-date with the latest technology advancements.

 

By adopting SLNet, organizations can significantly enhance their productivity by providing a reliable, scalable, and efficient Telnet solution that meets the demands of a modern, connected workforce. With SLNet, businesses can focus on their core operations, confident in the knowledge that their server infrastructure is optimized for maximum performance and scalability.

For more information about SLNet and how it can benefit your organization, visit https://seattlelab.com/.

Ensure your servers stay healthy with Load Balancing and SLNet

What is Load Balancing?

A load balancer is a tool to distribute the traffic between a group of servers (so if one server goes down another server can still be used).

The Azure load balancer also has a health probe function, where it periodically “probes” the SLNet servers to check that it gets a response from the telnet port and therefore thinks the server is “healthy”.

So the Azure Load Balancer Health Probes periodically probes the telnet port of the SLNet server to check that there is a response, to prevent RF scanners from attempting to connect if the telnet port doesn’t respond.

What changed with SLNet 6.7?

In earlier versions of SLNet these repeated and frequent probes (the frequency is set by the customer and can be as frequent as every 10 seconds) ended up blocking the telnet port so RF scanners couldn’t connect and the customer had to reboot the server. Also, it caused application crashes.

The fixes introduced in v6.7 have fixed this so SLNet is compatible with Azure load balancer health probe.

SLNet has been optimized to work alongside Azure Load Balancer Health Probe ensuring your RF scanners only connect to a server reporting a healthy status.

Try a free trial today

Why not try it out for yourself?

Click the link below to try a 14-day free trial of SLNet 6.7

End of Support for Windows Server 2012 and how SLNet can help

End of the line

On October 10th, support for Microsoft Windows Server 2012 and 2012 R2 was officially ended.

After this date, these products will no longer receive security updates, non-security updates, bug fixes, technical support, or online technical content updates.

Customers can continue using Windows Server 2012/R2 after this date, but at their risk, unless they pay for extended security updates. You might need to do this because you have a legacy application that won’t run on the new operating system.

Microsoft has recommended that its 2012 customers migrate to a newer version of Windows Server (2016, 2019, 2022)

Why do you need to upgrade?

  • Compliance issues: For healthcare and e-commerce industries that deal with lots of sensitive customer data, entrusting your data to an out-of-service technology would be seen as very dangerous.
  • Financial burden: Huge costs will be incurred through trying to maintain an out-of-service OS.
  • Security: With Microsoft no longer offering security patches for the products, this leaves your organisation in a vulnerable position from attacks.
  • Compatibility: As time goes by you will find fewer and fewer new applications that will work with your old operating system. This may mean having to use older versions of apps that themselves may be out of service.
  • Poor performance: All-round performance is just going to be slower on the legacy versions.

 

Where does SL6.7 come in?

Here at SeattleLab, we are committed to creating software to fully work with the latest Windows Server, 2022 and 2022 R2.

SLNet 6.7 is our first version to have full 64-bit compatibility, which works seamlessly with the latest version of Windows Server.

For a clearer picture of how SLNet from SeattleLab can help your organisation, visit our product page or download a free trial of our latest version SLNet 6.7 by clicking the link below.

 Download SLNet 6.7 Free Trial

 

Upgrading software: Why you should jump before your company is pushed

The end of the road has arrived.

We will say goodbye to our support for our 5.0/5.3 products in approximately 2 weeks on Dec 31st.

With the new year brings fresh emphasis on our 6.0/6.2/6.3 products as well as our SSH exclusive product SL Secure.

If you are currently running  5.0/5.3 you may be asking what end-of-support means for your organisation.

Below I will give a brief summary:

End of Support

End of support means from Jan 1st onwards, those customers exclusively using expired products will not be eligible for support.

If there are any significant issues after the above date, clients will be simply advised to upgrade to one of our newer versions (6.2/6.3)

Patches

This will also mean no further patches will be created for the legacy products.

While we know our products are trusted and run without a problem, we are aware that patches have needed to be created for some of our customers.

While this situation is quite rare, it may cause problems after the end of support deadline which leads to significant delays in your production pipeline.

Jump before being pushed

It is important to make these decisions on your time. No one wants to be forced to make such a decision without adequate planning and preparation.

We are advising all clients affected by this end-of-support announcement to upgrade to the latest version to avoid the headache that comes with production downtime.

Talk to us today and together we can plan your software upgrade to suit your schedule. Click the link below to schedule a call for a time that suits you best.

 Schedule a Call Today

 

 

How much does tech downtime cost your organization?

Upgrade to SSH

Everything at a halt

What is the financial cost of 1 hour of downtime to your organization and your clients?

Places like warehouses are synonymous with multiple types of technologies, both old and new, working alongside each other.

While they are uncommon, all these different technologies together can lead to temporary downtime when one of the technologies refuses to work.

These minor problems can lead to slight delays which can then in turn create more significant issues.

Client Disillusionment

This downtime no matter how brief can lead to client frustration.

This may be too much for clients who have to stick to a tight schedule and you may have to fight to keep these customers.

These end users, can’t take the risk that a similar issue may happen again. Delays cost them financially and the higher-ups won’t let this happen again.

You are forced to apologise and assure them no such downtime will happen again. But this is something you can’t be certain of, but with SeattleLab you can be sure that any issue will be looked at quickly and a solution to the problem will be found.

Protect your organisation

What your company needs is a technology they can trust. And when there is a rare issue, they can rely on a support team who is highly experienced and can work to solve any tech problems quickly and professionally.

With SeattleLab we have been working in the telnet industry for over 30 years and our support team is unrivalled.

Click the links below to download a free trial of our newest versions:

 

 Download SLNet Free Trial

 Download SL Secure Free Trial

 

 

 

 

Keep your system up to date with SLNet

upgrade

End of the line

As you may know, SeattleLab has decided to end the support for our legacy products 5.0 and 5.3 from December 31st 2022.

It has been a great run but we believe it is time to concentrate our efforts on our latest versions (v6.0 and v6.2) of which we are extremely proud.

This will mean there will no longer be bug fixes or patches available after this date. Our 5.3 customers have until then to upgrade to a newer version of our products.

Additionally, SLNet versions 6.2 and 6.3 are the only available versions fully compatible with Windows Server 2019, the most popular version of Windows server.

Since the release of Windows 2022, we have been helping many clients with this software upgrade to SLNet 6.3.

All gain, no pain

Changing versions can seem like a real headache, especially from software you know and trust. No one wants to move away from something that works.

But with SeattleLab we make every upgrade effortless and smooth. No changes are needed to your applications, workflow, processes or users.

If you are an existing customer, you can talk with our sales team today about the benefits of our most up-to-date software.

When you have an up-to-date support contract, significant discounts are available on these upgrades.

Contact us Today

Don’t be left behind when the end of support comes for our legacy products in December 2022

For more information please get in touch with our sales team at sales@seattlelab.com to find out how we can help.

Terminal Emulation: Any device, any application, any language

terminal emulation

Terminal Emulation

In any warehouse or retail outlet, there is usually a host of different technologies working together. When purchasing technology for this area, it is important that you buy something that works with everything.

Terminal emulation is the ability to make one computer terminal, commonly a PC, appear like another, usually an older version of a terminal so that a user can access programs originally written to communicate with the other terminal type.

One of the most common examples of this would be a modern server computer connecting to legacy terminals which are still in operation.

How we can help

One of the best features of our SeattleLab products is their adaptability.

Both SLNet & SL Secure can be customised to meet any terminal emulation or application character needs, details of which are provided in the Installation, Configuration and Administration Guide.

We can work with any character-based Windows console application.

SLNet & SL Secure provide ANSI terminal sequences (compatible with the VT-100 and VT-220) for cursor positioning and
formatted screen handling.

It supports colours, UTF-8 characters, Unicode characters and custom key mapping.

Try a Free Trial Today

To get a better understanding of how Terminal Emulation benefits our products, you can download a free trial of both our telnet and SSH products by clicking the links below:

 Download SLNet Free Trial

 Download SL Secure Free Trial