Citrix Releases Security Updates for Workspace Apps, Virtual Apps and Desktops

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Original release date: February 14, 2023

Citrix has released security updates to address high-severity vulnerabilities (CVE-2023-24486, CVE-2023-24484, CVE-2023-24485, and CVE-2023-24483) in Citrix Workspace Apps, Virtual Apps and Desktops. A local user could exploit these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review Citrix security bulletins CTX477618, CTX477617, and CTX477616 for more information and to apply the necessary updates.

This product is provided subject to this Notification and this Privacy & Use policy.

Mozilla Releases Security Updates for Firefox 110 and Firefox ESR

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Original release date: February 14, 2023

Mozilla has released security updates to address vulnerabilities in Firefox 110 and Firefox ESR. An attacker could exploit these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review Mozilla’s security advisories for Firefox 110 and Firefox ESR 102.8 for more information and apply the necessary updates.

This product is provided subject to this Notification and this Privacy & Use policy.

CISA Adds Four Known Exploited Vulnerabilities to Catalog

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Original release date: February 14, 2023

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note: To view the newly added vulnerabilities in the catalog, click on the arrow in the “Date Added to Catalog” column, which will sort by descending dates.

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 CVEs that carry significant risk to the federal enterprise. BOD 22-01 requires 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.

This product is provided subject to this Notification and this Privacy & Use policy.

Microsoft Releases February 2023 Security Updates

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Original release date: February 14, 2023

Microsoft has released updates to address multiple vulnerabilities in Microsoft software. An attacker can exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review Microsoft’s February 2023 Security Update Guide and Deployment Information and apply the necessary updates.

This product is provided subject to this Notification and this Privacy & Use policy.

Apple Releases Security Updates for Multiple Products

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Original release date: February 14, 2023

Apple has released security updates to address vulnerabilities in multiple products. An attacker could exploit these vulnerabilities to take control of an affected device.

CISA encourages users and administrators to review the Apple security updates page for the following products and apply the necessary updates as soon as possible:
•   Safari 16.3.1
•   iOS 16.3.1 and iPadOS 16.3.1
•   macOS 13.2.1

This product is provided subject to this Notification and this Privacy & Use policy.

CISA Releases One Industrial Control Systems Advisory

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Original release date: February 14, 2023

CISA released one Industrial Control Systems (ICS) advisory on February 14, 2023. This advisory provides timely information about current security issues, vulnerabilities, and exploits surrounding ICS.

CISA encourages users and administrators to review the newly released ICS advisory for technical details and mitigations:

This product is provided subject to this Notification and this Privacy & Use policy.

CISA Adds Three Known Exploited Vulnerabilities to Catalog

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Original release date: February 10, 2023

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note: To view the newly added vulnerabilities in the catalog, click on the arrow in the “Date Added to Catalog” column, which will sort by descending dates.

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 CVEs that carry significant risk to the federal enterprise. BOD 22-01 requires 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.

This product is provided subject to this Notification and this Privacy & Use policy.

#StopRansomware – Ransomware Attacks on Critical Infrastructure Fund DPRK Espionage Activities

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Original release date: February 9, 2023

CISA, the National Security Agency (NSA), the Federal Bureau of Investigation (FBI), the Department of Health and Human Services (HHS), and Republic of Korea’s Defense Security Agency and National Intelligence Service have released a joint Cybersecurity Advisory (CSA), Ransomware Attacks on Critical Infrastructure Fund DPRK Espionage Activities, to provide information on ransomware activity used by North Korean state-sponsored cyber to target various critical infrastructure sectors, especially Healthcare and Public Health (HPH) Sector organizations.

The authoring agencies urge network defenders to examine their current cybersecurity posture and apply the recommended mitigations in this joint CSA, which include:

  • Train users to recognize and report phishing attempts.
  • Enable and enforce phishing-resistant multifactor authentication. 
  • Install and regularly update antivirus and antimalware software on all hosts. 

See Ransomware Attacks on Critical Infrastructure Fund DPRK Espionage Activities for ransomware actor’s tactics, techniques, and procedures, indicators of compromise, and recommended mitigations. Additionally, review StopRansomware.gov for more guidance on ransomware protection, detection, and response.

For more information on state-sponsored North Korean malicious cyber activity, see CISA’s North Korea Cyber Threat Overview and Advisories webpage.

This product is provided subject to this Notification and this Privacy & Use policy.

CISA Releases Six Industrial Control Systems Advisories

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Original release date: February 9, 2023

CISA released six Industrial Control Systems (ICS) advisories on February 9, 2023. 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:

This product is provided subject to this Notification and this Privacy & Use policy.

OpenSSL Releases Security Advisory

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Original release date: February 9, 2023

OpenSSL has released a security advisory to address multiple vulnerabilities affecting OpenSSL versions 3.0.0, 2.2.2, and 1.0.2. An attacker could exploit some of these vulnerabilities to obtain sensitive information.

CISA encourages users and administrators to review the OpenSSL advisory and make the necessary updates.

This product is provided subject to this Notification and this Privacy & Use policy.