SSL Vulnerabilities – The Top Five Vulnerabilities of 2020

SSL Vulnerabilities - The Top Five Vulnerabilities of 2020

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Covered: No, no, and yes, yes.

We know that most SSL VPNs have an SSLv4 cipher suite and therefore that most of the SSLV (SSL/TLS) vulnerabilities have been fixed (again). That is not to say that every SSL/TLS vulnerability has been fixed, but it is unlikely that SSLv4-only vulnerabilities will be more problematic.

One of the more important vulnerabilities is SSLV3 (TLSv1): This is the vulnerability that could be used as the basis for an attack against SSH, and was the prime source of concern at first. Since then, it has been patched, and an SSLv1-only patch, but we don’t know if the SSLv3-only patches have been as successful.

SSLV3 is a TLS vulnerability where a man-in-the-middle could be an attacker on the TCP/UDP connection. When a third party connects to the server, they are listening for traffic from the server. They are supposed to be listening for an SSLv3v2 handshake, which means that they are listening for a non-cipherlist handshake; a cipherlist handshake is just partway through the connection and should not cause any security problems, so we are not worried yet. The flaw allows an attacker to take over the TCP/UDP connection and exploit the TLSv3 handshake in some way.

When the SSLv3 v3 handshake is received, it is checked by the server to see if it has already seen this handshake, and if not, it sends a ‘handshake failure’ message back to the client, which is what happened with the Vulnerability.

Client-side error message received back to the client, which shows that the connection is not open, or the client cannot access the server, or the client does not have the right to send and receive mail (in various ways).

Tenable Top Five Vulnerabilities of 2020

Tenable today released the first of three annual reports, which it calls “Tenable Top Five Vulnerabilities of 2020,” and lists out the top five vulnerabilities and the reasons they matter.

Web Browser Crashes – Web browsers such as Microsoft Edge and Google Chrome have grown over time from simple browser add-ons to powerful platforms. For instance, the open source Mozilla browser which has been used for many years by millions and millions of people. They need constant upgrades to stay current.

– Web browsers such as Microsoft Edge and Google Chrome have grown over time from simple browser add-ons to powerful platforms. For instance, the open source Mozilla browser which has been used for many years by millions and millions of people. They need constant upgrades to stay current. SQL Injection – People have had great success exploiting SQL injection vulnerabilities in the past but it has become less and less prevalent. It’s worth noting that the SQL injection vulnerability in Office 365 security update (CVE-2020-5160) doesn’t have a patch yet.

– People have had great success exploiting SQL injection vulnerabilities in the past but it has become less and less prevalent. It’s worth noting that the SQL injection vulnerability in Office 365 security update (CVE-2020-5160) doesn’t have a patch yet. Web Forms – Web sites which were designed or heavily leveraged through HTML and JavaScript have become much more popular. Attackers are trying to exploit a wide variety of vulnerabilities in these areas.

– Web sites which were designed or heavily leveraged through HTML and JavaScript have become much more popular. Attackers are trying to exploit a wide variety of vulnerabilities in these areas. Remote Command Execution & PowerShell – Remote code execution and command injection are attacks on the Web site or applications, not applications themselves. There can and will be more, and they’ll be harder to detect.

– Remote code execution and command injection are attacks on the Web site or applications, not applications themselves.

Tenable research has been revisited : How Attackers Exploit CVE-2019-11510 and Other Vulnerabilities in 2021.

Tenable research has been revisited : How Attackers Exploit CVE-2019-11510 and Other Vulnerabilities in 2021.

This exploit was publicly disclosed on the 25th of April 2019.

The Ukrainian security services issued a warning to the citizens about this vulnerability.

The Ukrainian security services did not give out any information about the DDoS attack and its parameters.

However, the Ukrainian security services published this information on the 11th of June 2020 as a follow up to the DDoS attack.

This parameter has been changed in recent updates of the Ukrainian security services.

Fortinet, Kaspersky ICS and Tenable Research uncovers unpatched bugs in FortiOS SSL VPN

Tenable Research has uncovered a number of flaws in Fortinet SSL VPN, FortiOS VPN client and FortiGate VPN servers that could allow an attacker to gain access to other devices through compromised servers.

Fortinet SSL VPN and FortiOS VPN client have been patched by Microsoft, and are believed to be working. However, these two vulnerabilities leave thousands of users without an option to use VPN, with a possible risk of a user seeing the same compromised server.

Kaspersky ICS and Tenable Research have independently discovered multiple similar bugs in Fortinet SSL VPN, a patch that is not yet available for either FortiOS VPN client or FortiGate VPN servers. These flaws could allow an attacker to gain access to other devices, and possibly, all devices without an existing VPN connection.

With a patch for Fortinet and FortiOS SSL VPN, Kaspersky Lab, Tenable Research and Tenable Labs announced that they are planning to launch a public demonstration of their new FortiGate VPN solution later this summer; the company intends to show users that their solution has been installed on numerous affected devices using Kaspersky Lab’s Virtual Private Network (VPN) security research platform.

We’ve received a couple of inquiries related to this issue. We are not able to provide any specific details or answers at this time. Thanks for your understanding.

The Fortinet SSL VPN vulnerabilities described by Tenable Research are not available for FortiOS VPN client or FortiGate VPN servers.

Fortinet SSL VPN and FortiOS VPN client have been patched by Microsoft. FortiOS VPN client has been patched by Fortinet. Fortinet fixes FortiOS SSL VPN.

Tenable Research has uncovered a number of flaws in Fortinet SSL VPN, FortiOS VPN client and FortiGate VPN servers that could allow an attacker to gain access to other devices through compromised servers.

Tips of the Day in Network Security

It’s always good to hear how a business is doing on the inside, too.

That’s why we asked some of our readers’ security-related questions to a local business, and heard what their answers were, in the form of security tips.

The following is a list of questions, many of which you can already use, but please, feel free to add your own questions in the comments section. Each is followed by a short response by a different security expert, from a former employee who’s retired now to another who is now a security advocate.

A: That’s a very good question. One of the first things we’d do is to send a virus alert to the other party via our virus scanner. If they don’t respond on the first scan, we’ll then send another scan to find them, and if that doesn’t work, we’ll send a third scan.

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Spread the loveCovered: No, no, and yes, yes. We know that most SSL VPNs have an SSLv4 cipher suite and therefore that most of the SSLV (SSL/TLS) vulnerabilities have been fixed (again). That is not to say that every SSL/TLS vulnerability has been fixed, but it is unlikely that SSLv4-only vulnerabilities will be more problematic.…

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