Mozilla Releases Security Updates for Firefox, Firefox ESR

Mozilla has released security updates to address vulnerabilities in Firefox and Firefox ESR. An attacker could exploit some of these vulnerabilities to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to review Mozil...

Increased Emotet Malware Activity

The Cybersecurity and Infrastructure Security Agency CISA is aware of a recent increase in targeted Emotet malware attacks. Emotet is a sophisticated Trojan that commonly functions as a downloader or dropper of other malware. Emotet primarily spreads via malicious email attachments and attempts t...

Reminder: CISA Publishes Weekly Vulnerability Summaries

Did you know that the Cybersecurity and Infrastructure Security Agency CISA publishes a weekly Vulnerability Bulletin? This recurring item provides a summary of all new vulnerabilities that have been recorded by the CISA-sponsored National Institute of Standards and Technology NIST National...

Google Releases Security Updates for Chrome

Google has released Chrome 78.0.3904.108 for Windows, Mac, and Linux. This version addresses vulnerabilities that an attacker could exploit to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to review the Chrome...

Google Releases Security Updates for Chrome

Google has released Chrome version 77.0.3865.75 for Windows, Mac, and Linux. This version addresses multiple vulnerabilities that an attacker could exploit to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to revie...

Atlassian Releases Security Updates for Jira

Atlassian has released security updates to address a vulnerability affecting Jira Server and Jira Data Center. A remote attacker could exploit this vulnerability to take control of an affected system. The Cybersecurity and Infrastructure Security Agency CISA encourages users and administrators to...

CISA Emergency Directive on DNS Infrastructure Tampering

The U.S. Department of Homeland Security DHS Cybersecurity and Infrastructure Security Agency CISA issued an emergency directive to address ongoing incidents associated with global Domain Name System DNS infrastructure tampering. CISA is aware of multiple executive branch agency domains that were...

Mozilla Releases Security Updates for Firefox

Mozilla has released security updates to address vulnerabilities in Firefox and Firefox ESR. A remote attacker could exploit some of these vulnerabilities to take control of an affected system. The National Cybersecurity and Communications Integration Center NCCIC, part of the Cybersecurity and...

Microsoft Releases Security Update for Yammer

Microsoft has released a security update to address a vulnerability in the Yammer desktop application. A remote attacker could exploit this vulnerability to take control of an affected system. NCCIC encourages users and administrators to review the Microsoft Security Advisory and apply the...

Microsoft Releases April 2018 Security Updates

Microsoft has released updates to address vulnerabilities in Microsoft software. A remote attacker could exploit some of these vulnerabilities to take control of an affected system. NCCIC encourages users and administrators to review Microsoft's April 2018 Security Update Summary and Deployment...

Mozilla Releases Security Updates for Firefox

Mozilla has released security updates to address vulnerabilities in Firefox and Firefox ESR. An attacker could exploit some of these vulnerabilities to take control of an affected system. NCCIC/US-CERT encourages users and administrators to review the Mozilla Security Advisories for Firefox 59 an...

Data Privacy Day

January 28 is Data Privacy Day DPD, an annual international effort to promote the importance of data privacy. DPD is sponsored in the United States by the National Cyber Security Alliance NCSA with the theme, Respecting Privacy, Safeguarding Data, and Enabling Trust. The NCSA Stay Safe Online...

Cisco Releases Security Updates

Cisco has released security updates to address a vulnerability in its WebEx browser extension on Google Chrome and Mozilla Firefox. A remote attacker could exploit this vulnerability to take control of a system. US-CERT encourages users and administrators to review the Cisco Security Advisory for...

Cisco Releases Security Updates

Cisco has released a security advisory to address Simple Network Management Protocol SNMP vulnerabilities in its IOS and IOS XE software. A remote attacker could exploit these vulnerabilities to take control of an affected system. US-CERT encourages users and administrators to review the Cisco...

Multiple Petya Ransomware Infections Reported

US-CERT has received multiple reports of Petya ransomware infections in many countries around the world. Ransomware is a type of malicious software that infects a computer and restricts users' access to the infected machine until a ransom is paid to unlock it. Individuals and organizations are...

ISC Releases Security Updates for BIND

The Internet Systems Consortium ISC has released updates that address several vulnerabilities in BIND. An attacker could exploit one of these vulnerabilities to take control of an affected system. Available updates include: BIND version 9.11.1-P1 BIND version 9.10.5-P1 BIND version 9.9.10-P1 ISC...

Google Releases Security Update for Chrome

Google has released Chrome version 57.0.2987.98 for Windows, Mac, and Linux. This version addresses multiple vulnerabilities that, if exploited, may allow an attacker to take control of an affected system. US-CERT encourages users and administrators to review the Chrome Releases page and apply th...

Cisco Releases Security Updates

Cisco has released security updates to address a vulnerability in its Cisco CloudCenter Orchestrator. Exploitation of this vulnerability could allow a remote attacker to take control of an affected system. Users and administrators are encouraged to review the Cisco Security Advisory and apply the...

Joomla! Releases Security Update for CMS

Joomla! has released version 3.6.5 of its Content Management System CMS software to address multiple vulnerabilities. Exploitation of one of these vulnerabilities may allow a remote attacker to take control of an affected website. US-CERT encourages users and administrators to review the Joomla!...

Adobe Releases Security Updates

Adobe has released security updates to address vulnerabilities in Flash Player and the Creative Cloud Desktop Application. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected system. US-CERT encourages users and administrators to review Adobe...

Increased Risks from Macro-Based Malware

Microsoft Office applications use macros to automate routine tasks. However, macros can contain malicious code that can be used to exploit vulnerable systems. Recently, there has been a resurgence of malware that is spread via macros. Individuals and organizations should proactively secure system...

Cisco Releases Security Updates

Cisco has released security updates to address vulnerabilities in its Web Security Appliance software. Exploitation of these vulnerabilities could cause a denial-of-service-condition on an affected system. Users and administrators are encouraged to review the following Cisco Security Advisories a...

Mozilla Releases Security Updates

Mozilla has released security updates to address multiple vulnerabilities in Firefox and Firefox ESR. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected system. Available updates include: Firefox 46 Firefox ESR 38.8 Firefox ESR 45.1 Users and...

Apple Releases Multiple Security Updates

Apple has released security updates for iOS, watchOS, tvOS, Xcode, OS X El Capitan, OS X Server 5.1, and Safari to address multiple vulnerabilities. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected system. Available updates include: iOS 9.3...

Apple Releases Security Update

Apple has released a security update to address a vulnerability in Apple Software Update. Exploitation of this vulnerability may allow a remote attacker to take control of an affected system. US-CERT encourages users and administrators to review the Apple security website for Software Update 2.2...

Google Releases Security Update for Chrome

Google has released Chrome version 49.0.2623.87 to address multiple vulnerabilities for Windows, Mac, and Linux. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected system. US-CERT encourages users and administrators to review the Chrome Releas...

Drupal Releases Security Updates

Drupal has released updates to address multiple vulnerabilities. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected website. Available updates include: Drupal core 6.38 for 6.x users Drupal core 7.43 for 7.x users Drupal core 8.0.4 for 8.0.x...

OpenSSL Releases Security Advisory

OpenSSL versions 1.0.2f and 1.0.1r have been released to address vulnerabilities in prior versions. Exploitation of these vulnerabilities may allow a remote attacker to obtain sensitive information. US-CERT encourages users and administrators to review the OpenSSL Security Advisory and apply the...

Cisco Releases Security Updates

Cisco has released security updates to address vulnerabilities in Modular Encoding Platform D9036 software, Unified Computing System UCS Manager software, and Firepower 9000 Series devices. Exploitation of these vulnerabilities could allow a remote attacker to take control of an affected device...

Securing Home and Small Business Routers

Home and Small Business routers have become the ideal target for attackers seeking to gain control over a user's gateway to the Internet. Router misconfigurations e.g., default credentials, interfaces open to the Internet or the lack of security precautions e.g., absence of updates may make users...

Mozilla Releases Security Updates for Firefox and Firefox ESR

The Mozilla Foundation has released security updates to address vulnerabilities in Firefox and Firefox ESR. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of an affected system. Available updates include: Firefox 43 Firefox ESR 38.5 US-CERT encourages...

IRS Releases First in a Series of Tax Security Tips

The Internal Revenue Service IRS has released the first in a series of tips intended to increase public awareness of how to protect personal and financial data online and at home. A new tip will be available each Monday through the start of the tax season in January. The first tip focuses on seve...

Google Releases Security Update for Chrome

Google has released Chrome version 45.0.2454.101 to address multiple vulnerabilities for Windows, Mac, and Linux. Exploitation of one of these vulnerabilities may allow a remote attacker to obtain sensitive information from an affected system. Users and administrators are encouraged to review the...

VMware Releases Security Update

VMware has released a security update to address a Lightweight Directory Access Protocol LDAP certificate validation vulnerability in vCenter Server. Exploitation of this vulnerability may allow an attacker to obtain sensitive information. Available updates include: VMware vCenter Server version...

Updates Available for Flash AS3 opaqueBackground and BitmapData Use-After-Free Vulnerabilities

Adobe has released security updates to address critical vulnerabilities within the ActionScript 3 opaqueBackground and BitmapData classes of Flash Player. Exploitation of these vulnerabilities could allow a remote attacker to execute arbitrary code on a vulnerable system. Versions affected includ...

Microsoft Releases June 2015 Security Bulletin

Microsoft has released eight updates to address vulnerabilities in Microsoft Windows. Exploitation of some of these vulnerabilities could allow remote code execution or elevation of privileges. US-CERT encourages users and administrators to review Microsoft Security Bulletins MS15-056 through...

Microsoft Releases May 2015 Security Bulletin

Microsoft has released 13 updates to address vulnerabilities in Microsoft Windows. Some of these vulnerabilities could allow elevation of privilege, denial of service, remote code execution, information disclosure, or security feature bypass. US-CERT encourages users and administrators to review...

Google Releases Security Update for Chrome

Google has released Chrome version 42.0.2311.135 for Windows, Mac, and Linux to address multiple vulnerabilities. Exploitation of one of these vulnerabilities may allow a remote attacker to take control of an affected system. US-CERT encourages users and administrators to review the Google Chrome...

IC3 Warns of Cyber Attacks Focused on Law Enforcement and Public Officials

The Internet Crime Complaint Center IC3 has issued an alert warning that law enforcement personnel and public officials may be at an increased risk of cyber attacks. Doxing—the act of gathering and publishing individuals’ personal information without permission—has been observed. Hacking...

Apple Releases Security Updates for OS X, iOS, Safari, and Apple TV

Apple has released security updates for OS X, iOS, Safari, and Apple TV to address multiple vulnerabilities. Exploitation of some of these vulnerabilities may allow a remote attacker to take control of the affected system. Available updates include: OS X Yosemite v10.10.3 and Security Update...

Guidance for Defending Against Destructive Malware

The Information Assurance Directorate of the National Security Agency NSA has released a report on Defensive Best Practices for Destructive Malware. This report details several steps network defenders can take to detect, contain, and minimize destructive malware infections. US-CERT encourages use...

Mozilla Releases Security Updates for Firefox and Thunderbird

The Mozilla Foundation has released security updates to address multiple vulnerabilities in Firefox and Thunderbird. Exploitation of these vulnerabilities may allow an attacker to obtain sensitive information, cause a denial of service, or exploit a buffer overflow on an affected browser. Updates...

OpenSSL 'Heartbleed' Vulnerability

A vulnerability in OpenSSL could allow a remote attacker to expose sensitive data, possibly including user authentication credentials and secret keys, through incorrect memory handling in the TLS heartbeat extension. This may allow an attacker to decrypt traffic or perform other attacks. OpenSSL...

Cisco Releases Security Advisory for Prime Infrastructure Command Execution Vulnerability

Cisco has released a security advisory to address a vulnerability in Cisco Prime Infrastructure software versions 1.2, 1.3, 1.4, and 2.0 which could allow an unauthenticated, remote attacker to execute arbitrary commands with root-level privileges. US-CERT encourages users and administrators to...

Apple Releases Security Update for Java on OS X

Apple has released a security update for Java on Mac OS X v10.6.8, Mac OS X Server v10.6.8, OS X Lion v10.7 or later, OS X Lion Server v10.7 or later, and OS X Mountain Lion 10.8 or later to address multiple vulnerabilities. These vulnerabilities may allow an attacker to execute arbitrary code wi...

Cisco Releases Security Advisory

Cisco has released a security advisory to address a vulnerability in the Cisco TelePresence System. This vulnerability may allow a remote attacker to access the web server via a user account created with default credentials, which gives the attacker full administrative rights to the system. US-CE...

Recent Reports of DHS-Themed Ransomware (UPDATE)

US-CERT has received reports of increased activity concerning an apparently DHS-themed ransomware malware infection occurring in the wild. Users who are being targeted by the ransomware receive a message claiming that use of their computer has been suspended and that the user must pay a fine to...

Scams Exploiting Boston Marathon Explosion

Malicious actors are exploiting the April 15 explosions at the Boston Marathon in attempts to collect money intended for charities and to spread malicious code. Fake websites and social networking accounts have been set up to take advantage of those interested in learning more details about the...

UPDATE: Ongoing Malicious Cyber Activity Against U.S. Government and Private Sector Entities

UPDATE: The United States Department of Homeland Security, in collaboration with the Federal Bureau of Investigation and other partners, has released a second Joint Indicator Bulletin JIB through secure channels. Confirmed members of the cybersecurity community of practice, which may include...

Holiday Season Phishing Scams and Malware Campaigns

Since the winter holidays are quickly approaching, US-CERT is republishing this entry to increase awareness about phishing scams and malware campaigns. In the past, US-CERT has received reports of an increased number of phishing scams and malware campaigns that take advantage of the winter holida...