Red Hat Security Advisory 2023-5706-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5706.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: dotnet6.0 security updateAdvisory ID:        RHSA-2023:5706-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5706Issue date:         2023-10-16Revision:           01CVE Names:          CVE-2023-44487====================================================================Summary: An update for dotnet6.0 is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23.Security Fix(es):* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-44487References:https://access.redhat.com/security/updates/classification/#importanthttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5706-01

Red Hat Security Advisory 2023-5705-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5705.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: rh-dotnet60-dotnet security, bug fix, and enhancement updateAdvisory ID:        RHSA-2023:5705-01Product:            .NET Core on Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5705Issue date:         2023-10-16Revision:           01CVE Names:          CVE-2023-44487====================================================================Summary: An update for rh-dotnet60-dotnet is now available for .NET Core on Red Hat Enterprise Linux.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23.The following packages have been upgraded to a later upstream version: rh-dotnet60-dotnet (6.0.123). (BZ#2242122)Security Fix(es):* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-44487References:https://access.redhat.com/security/updates/classification/#importanthttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5705-01

Red Hat Security Advisory 2023-5679-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.12.39. Issues addressed include a denial of service vulnerability.

The following data is constructed from data provided by Red Hat's json file at:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5679.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: OpenShift Container Platform 4.12.39 packages and security update  
Advisory ID:        RHSA-2023:5679-01  
Product:            Red Hat OpenShift Enterprise  
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:5679  
Issue date:         2023-10-18  
Revision:           01  
CVE Names:          CVE-2023-39325  
====================================================================

Summary: 

Red Hat OpenShift Container Platform release 4.12.39 is now available with updates to packages and images that fix several bugs and add enhancements.

This release includes a security update for Red Hat OpenShift Container Platform 4.12.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.

This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.12.39. See the following advisory for the container images for this release:

https://access.redhat.com/errata/RHSA-2023:5677

Security Fix(es):

* golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487) (CVE-2023-39325)

* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)

A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.12/updating/updating-cluster-cli.html

Solution:

https://access.redhat.com/articles/11258

CVEs:

CVE-2023-39325

References:

https://access.redhat.com/security/vulnerabilities/RHSB-2023-003  
https://access.redhat.com/security/updates/classification/#important

Red Hat Security Advisory 2023-5679-01

Advantech R-SeeNet v2.4.23 allows an unauthenticated remote attacker to read from and write to the snmpmon.ini file, which contains sensitive information.

_All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability._

_Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order._

_For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page._

_If you have questions or corrections about this advisory, please email \[email protected\]_

Tenable Advisory ID

TRA-2023-33

CVSSv3 Base / Temporal Score

CVSSv3 Vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

Advantech R-SeeNet v2.4.23

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CVE-2023-5642: Advantech R-SeeNet snmpmon.ini Unauthenticated Read Write

The sophisticated APT employs various tactics to abuse Windows and other built-in protocols with both custom and public malware to take over victim systems.

North Korea's Kimsuky advanced persistent threat (APT) continues to evolve its attack methods and grow in sophistication, expanding its ability to control victims' systems with the use of legitimate system remote-desktop tools and novel custom malware in its latest attacks.

The threat group — one of several that work at the behest of North Korean Supreme Leader Kim Jong-Un — recently has been spotted abusing Remote Desktop Protocol (RDP) and other tools that allow it to remotely take over targeted systems, even installing open source software to an environment if RDP is not present, researchers from South Korea's AhnLab revealed in a blog post Oct. 18.

"The Kimsuky threat group is continuously abusing RDP to obtain control over infected systems and exfiltrate information," according to the post by the AhnLab Security Response Center. "RDP can also be used in the initial access process using brute force and dictionary attacks, or during lateral movement."

Kimsuky, active since 2013 to commit cyber espionage on the behalf of Jong-Un's regime, is also evolving tactics beyond this protocol to gain remote control of compromised desktop systems in recent attacks, according to the researchers.

In addition to RDP abuse, the group is wielding the open-source virtual network computing (VNC) tool TightVNC, which is similar to RDP in that it's a screen-sharing system for remote control of other computers. In some cases, the group even tapped Chrome Remote Desktop, which is supported by the Google Chrome browser, to control infected systems, the researchers said.

**Malware Mix**

Overall, recent attacks show Kimsuky continuing to use spear phishing as its initial method of access to compromise systems with BabyShark, its oft-used custom malware for persistence and the collection of system info, before attackers move on to installing other custom-built and open source malware.

The group also has added new post-compromise malware to its arsenal, leveraging RevClient to send commands from its command-and-control (C2) server to add user accounts to a victim's system, and public malware TinyNuke, a banking Trojan.

As is typical, the ultimate goal after gaining control of systems is to steal internal information and technology from its targets, which are typically research, defense, diplomatic, and academic sectors in South Korea but also other countries that demonstrate a political or strategic interest for the regime.

**Multiple-Session RDP**

One particularly interesting bit of novel RDP functionality that Kimsuky has been seen wielding recently is the ability to support multiple sessions of RDP on a Windows system — something that Windows desktop OS natively does not allow.

"Ordinarily in Windows desktop environments, only one session is supported when connecting via RDP, unlike servers," according to the post. "As only one session is supported for one system, even if the user accounts are different, when the threat actor remotely connects to a system, the existing user's session is terminated."

In previous attacks, Kimsuky used Mimikatz and other malware to patch the memory of the currently running RDP service process to bypass the single-session limit. However, in recent attacks, the group now is using malware named "multiple.exe" to support multiple-session RDP, as well as to add user accounts for further control.

The novel malware RevClient that the group deploys in recent attacks also has features similar to "multiple.exe" but executes multiple-session capability in a different way, according to the researchers. Kimsuky also is leveraging RevClient to receive commands from C2 to perform user account-related tasks as part of its overall control of a compromised system.

**Defending Against RDP Abuse**

With lines beginning to blur between Kimsuky and other North Korea-sponsored groups like Lazarus as they organize and align to share tools and tactics, it's important that organizations do what they can to protect themselves against these evolving threats, according to AhnLab.

RDP is an especially sensitive attack surface because it's one of the services that come pre-installed in Windows systems, demanding adequate management to detect or prevent such incidents of compromise.

To do this, users should refrain from opening attachments on suspicious emails or when installing external software and instead only purchase or download them from official websites, the researchers noted. Desktop users also should set complex passwords for their accounts and change them periodically to diminish chances that they can be brute-forced.

Updating to the latest and most secure versions of the Windows OS and employing endpoint security products as well as sandbox-based APT solutions can also help protect systems against cyberattacks.

North Korea's Kimsuky Doubles Down on Remote Desktop Control

Categories: Threat Intelligence
Tags: malvertising

Tags: keepass

Tags: punycode

Tags: malware

Tags: ads

Tags: google

Threat actors are doubling down on brand impersonation by using lookalike domain names.



(Read more...)




The post Clever malvertising attack uses Punycode to look like KeePass's official website appeared first on Malwarebytes Labs.

Threat actors are known for impersonating popular brands in order to trick users. In a recent malvertising campaign, we observed a malicious Google ad for KeePass, the open-source password manager which was extremely deceiving. We previously reported on how brand impersonations are a common occurrence these days due to a feature known as tracking templates, but this attack used an additional layer of deception.

The malicious actors registered a copycat internationalized domain name that uses Punycode, a special character encoding, to masquerade as the real KeePass site. The difference between the two sites is visually so subtle it will undoubtably fool many people.

We have reported this incident to Google but would like to warn users that the ad is still currently running.

**Malicious ad for KeePass**

The malicious advert shows up when you perform a Google search for 'keepass', the popular open-source password manager. The ad is extremely deceiving as it features the official Keepass logo, URL and is featured before the organic search result for the legitimate website.

By simply looking at the ad, you would have no idea that it is malicious. 

_Figure 1: Malicious ad for KeePass followed by legitimate organic search result_

People who click on the ad will be redirected via a cloaking service that is meant to filter sandboxes, bots and anyone not deemed to be a genuine victim. The threat actors have set up a temporary domain at keepasstacking\[.\]site that performs the conditional redirect to the final destion:

_Figure 2: Network traffic showing the sequence of redirects upon clicking the ad_

**ķeepass.info**

Looking at the network traffic log above, we can see that the destination site uses Punycode, a special encoding to convert Unicode characters to ASCII. The deception is complete for users who may want to verify that they are on the right website.

_Figure 3: The fake KeePass site with a barely noticeable different font_

While it is barely noticeable, there is a small character under the 'k'. We can confirm it by converting the internationalized domain name _xn--eepass-vbb\[.\]info_ to _ķeepass\[.\]info_:

_Figure 4: Converting Punycode to ASCII_

**Decoy site links to malicious download**

While the decoy site is not an exact replica of the real one, it still looks very convincing:

_Figure 5: Comparing the legitimate site (left) with the fake one (right)_

Victims wanting to download KeePass will retrieve a malicious .msix installer that is digitally signed:

_Figure 6: The malicious MSIX installer showing a valid digital signature_

Extracting the installer's content reveals malicious PowerShell code that belongs to the FakeBat malware family:

_Figure 7: The contents of the MSIX installer_

This script communicates with the malware's command and control server to advertise the new victim before downloading a payload that sets the stage for future recon by human threat actors.

_Figure 8: Process view showing execution of the MSIX installer_

**A more sophisticated threat**

While Punycode with internationalized domain names has been used for years by threat actors to phish victims, it shows how effective it remains in the context of brand impersonation via malvertising. Users are first deceived via the Google ad that looks entirely legitimate and then again via a lookalike domain.

As we have noted recently, malvertising via search engines is getting more sophisticated. For end users this means that it has become very important to pay close attention where you download programs from and where you should avoid them. In a business environment, we recommend IT admins provide internal repositories where employees can retrieve software installers safely.

**Indicators of Compromise**

Ad domain/redirect

keepasstacking\[.\]site

Fake KeePass site

xn--eepass-vbb\[.\]info

Malicious KeePass download URL

xn--eepass-vbb\[.\]info/download/KeePass-2.55-Setup.msix

Malicious KeePass installer

181626fdcff9e8c63bb6e4c601cf7c71e47ae5836632db49f1df827519b01aaa

Malware C2

756-ads-info\[.\]xyz

Payload

refreshmet\[.\]com/Package.tar.gpg

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Clever malvertising attack uses Punycode to look like KeePass's official website

Unauth. Stored Cross-Site Scripting (XSS) vulnerability in wpdevart Gallery – Image and Video Gallery with Thumbnails plugin <= 2.0.3 versions.

**Solution**

 No fix

No patched version is available.

Found this useful? Thank thiennv for reporting this vulnerability. Buy a coffee ☕

thiennv discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Responsive Image Gallery, Gallery Album Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has not been known to be fixed yet.

**Other vulnerabilities in this plugin**

 3 present

 2 patched

View all

**WordPress plugin developer?**

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Apply for MVDP

**Security researcher?**

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CVE-2023-45630: WordPress Gallery – Image and Video Gallery with Thumbnails  plugin <= 2.0.3 - Cross Site Scripting (XSS) vulnerability - Patchstack

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WebDorado SpiderVPlayer plugin <= 1.5.22 versions.

**Solution**

 No fix

No patched version is available.

Found this useful? Thank Elliot for reporting this vulnerability. Buy a coffee ☕

Elliot discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Video Player Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has not been known to be fixed yet.

**Other vulnerabilities in this plugin**

 1 present

 2 patched

View all

**WordPress plugin developer?**

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Apply for MVDP

**Security researcher?**

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CVE-2023-45632: WordPress SpiderVPlayer plugin <= 1.5.22 - Reflected Cross Site Scripting (XSS) vulnerability - Patchstack

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in QROkes QR Twitter Widget plugin <= 0.2.3 versions.

**Solution**

 No fix

No patched version is available.

Found this useful? Thank Mika for reporting this vulnerability. Buy a coffee ☕

Mika discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress QR Twitter Widget Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has not been known to be fixed yet.

**No other known vulnerabilities for this plugin**Report

**WordPress plugin developer?**

Start a free security program for your WordPress plugins or request an audit.

Apply for MVDP

**Security researcher?**

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CVE-2023-45628: WordPress QR Twitter Widget plugin <= 0.2.3 - Cross Site Scripting (XSS) vulnerability - Patchstack

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Hector Cabrera WordPress Popular Posts plugin <= 6.3.2 versions.

**Solution**

 Fixed

Update the WordPress WordPress Popular Posts plugin to the latest available version (at least 6.3.3).

Found this useful? Thank Rafie Muhammad (Patchstack) for reporting this vulnerability. Buy a coffee ☕

Rafie Muhammad (Patchstack) discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress WordPress Popular Posts Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has been fixed in version 6.3.3.

**Other vulnerabilities in this plugin**

 0 present

 6 patched

View all

**WordPress plugin developer?**

Start a free security program for your WordPress plugins or request an audit.

Apply for MVDP

**Security researcher?**

Report to Patchstack Alliance bounty platform and earn monthly cash prizes.

Learn more

Tag

#web