Cybersecurity

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CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation.

  • CVE-2024-21893 Ivanti Connect Secure, Policy Secure, and Neurons Server-Side Request Forgery (SSRF) Vulnerability

These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

Hitron Systems Security Camera DVR

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v3 8.1
  • ATTENTION: Exploitable remotely/low attack complexity/public exploits are available/known public exploitation
  • Vendor: Hitron Systems
  • Equipment: DVR
  • Vulnerability: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to affect the availability of the product through exploitation of an improper input validation vulnerability and default credentials.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Hitron Systems DVR, a digital video recorder, are affected:

  • DVR HVR-4781: Versions 1.03 through 4.02
  • DVR HVR-8781: Versions 1.03 through 4.02
  • DVR HVR-16781: Versions 1.03 through 4.02
  • DVR LGUVR-4H: Versions 1.02 through 4.02
  • DVR LGUVR-8H: Versions 1.02 through 4.02
  • DVR LGUVR-16H: Versions 1.02 through 4.02

3.2 Vulnerability Overview

3.2.1 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR HVR-4781 versions 1.03 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-22768 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.2.2 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR HVR-8781 versions 1.03 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-22769 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.2.3 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR HVR-16781 versions 1.03 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-22770 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.2.4 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR LGUVR-4H versions 1.02 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-22771 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.2.5 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR LGUVR-8H versions 1.02 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-22772 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.2.6 IMPROPER INPUT VALIDATION CWE-20

An improper input validation vulnerability exists in Hitron Systems DVR LGUVR-16H versions 1.02 through 4.02 that could allow an attacker to cause a denial-of-service condition when using default admin name and password.

CVE-2024-23842 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: South Korea

3.4 RESEARCHER

Aline Eliovich, Chad Seaman, and Larry Cashdollar of Akamai Technologies reported this vulnerability to CISA.

4. MITIGATIONS

Hitron Systems has released the following updates for their DVR:

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA has received reports of this vulnerability being actively exploited.

5. UPDATE HISTORY

  • January 30, 2024: Initial Publication

Emerson Rosemount GC370XA, GC700XA, GC1500XA

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v3 9.8
  • ATTENTION: Exploitable remotely
  • Vendor: Emerson
  • Equipment: Rosemount GC370XA, GC700XA, GC1500XA
  • Vulnerabilities: Command Injection, Improper Authentication, Improper Authorization

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an unauthenticated attacker with network access to run arbitrary commands, access sensitive information, cause a denial-of-service condition, and bypass authentication to acquire admin capabilities.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Emerson Rosemount Gas Chromatographs are affected:

  • GC370XA: Version 4.1.5
  • GC700XA: Version 4.1.5
  • GC1500XA: Version 4.1.5

3.2 Vulnerability Overview

3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77

In Emerson Rosemount GC370XA, GC700XA, and GC1500XA products, an unauthenticated user with network access could execute arbitrary commands in root context from a remote computer.

CVE-2023-46687 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77

In Emerson Rosemount GC370XA, GC700XA, and GC1500XA products, an authenticated user with network access could run arbitrary commands from a remote computer.

CVE-2023-49716 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.9 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H).

3.2.3 IMPROPER AUTHENTICATION CWE-287

In Emerson Rosemount GC370XA, GC700XA, and GC1500XA products, an unauthenticated user with network access could bypass authentication and acquire admin capabilities.

CVE-2023-51761 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.3 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H).

3.2.4 IMPROPER AUTHORIZATION CWE-285

In Emerson Rosemount GC370XA, GC700XA, and GC1500XA products, an unauthenticated user with network access could obtain access to sensitive information or cause a denial-of-service condition.

CVE-2023-43609 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.9 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy, Chemical
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Vera Mens of Claroty Research reported these vulnerabilities to Emerson.

4. MITIGATIONS

Emerson recommends end users update the affected products’ firmware. For update information, contact Emerson Tech Support. Emerson recommends end users continue to use current cybersecurity industry best practices, and in the event such infrastructure is not implemented within an end user’s network, the user should take action to ensure the affected product is connected to a well-protected network and not connected to the Internet. For more information, refer to the Emerson Security web page.

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities have a high attack complexity.

5. UPDATE HISTORY

  • January 30, 2024: Initial Publication

New Mitigations to Defend Against Exploitation of Ivanti Connect Secure and Policy Secure Gateways

CISA is releasing this alert to provide cyber defenders with new mitigations to defend against threat actors exploiting Ivanti Connect Secure and Policy Secure Gateways vulnerabilities in Ivanti devices (CVE-2023-46805 and CVE-2024-21887).  

Threat actors are continuing to leverage vulnerabilities in Ivanti Connect Secure and Policy Secure Gateways to capture credentials and/or drop webshells that enable further compromise of enterprise networks. Some threat actors have recently developed workarounds to current mitigations and detection methods and have been able to exploit weaknesses, move laterally, and escalate privileges without detection. CISA is aware of instances in which sophisticated threat actors have subverted the external integrity checker tool (ICT), further minimizing traces of their intrusion.  

If an organization has been running Ivanti Connect Secure (9.x and 22.x) and Policy Secure gateways over the last several weeks and/or continues to run these products, CISA recommends continuous threat hunting on any systems connected to—or recently connected to—the Ivanti device. Additionally, organizations should monitor authentication, account usage, and identity management services that could be exposed and isolate the system(s) from any enterprise resources as much as possible.  

After applying patches, when these become available, CISA recommends that organizations continue to hunt their network in order to detect any compromise that may have occurred before patches were implemented.  

This guidance supplements CISA’s previous guidance for mitigation and detection, which remains applicable. For previous guidance, see CISA Issues Emergency Directive on Ivanti Vulnerabilities and Ivanti Releases Security Update for Connect Secure and Policy Secure Gateways. 

CISA Releases Eight Industrial Control Systems Advisories

CISA released eight Industrial Control Systems (ICS) advisories on January 30, 2024. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS.

 

CISA encourages users and administrators to review the newly released ICS advisories for technical details and mitigations.