The US-CERT Current Activity web page is a regularly updated summary of the most frequent, high-impact types of security incidents currently being reported to the US-CERT.

Apple Mac Defender, MacProtector, and MacSecurity Fake Anti-Virus Software

Apple has released a security advisory related to the recent Mac fake anti-virus software. The most common names for this fake anti-virus software are MacDefender, MacProtector, and MacSecurity. This fake anti-virus software is the result of a phishing scam targeting Mac users that redirects them from legitimate websites to fake websites. These fake websites notify the user that their computer is infected with a virus, and the user is tricked into installing the fake anti-virus software to solve the issue.

Google Chrome Releases 11.0.696.71

Google has released Chrome 11.0.696.71 for Windows, Mac, Linux, and Chrome Frame to address multiple vulnerabilities. These vulnerabilities may allow an attacker to execute arbitrary code.

US-CERT encourages users and administrators to review the Google Chrome Releases blog entry and update to Chrome 11.0.696.71 to help mitigate the security risks.

Microsoft Releases New Version of EMET

Microsoft has released a new, fully supported version of the Enhanced Mitigation Experience Toolkit (EMET) designed to mitigate exploitation attempts. EMET allows users to manage security mitigation technologies to make it more difficult for an attacker to exploit software vulnerabilities.

US-CERT encourages users and administrators to review the Microsoft Security Research and Defense blog entry for further information about this new version of EMET.

Mississippi Flooding Disaster Email Scams, Fake Antivirus, and Phishing Attack Warning

Users should be aware of potential email scams, fake antivirus, and phishing attacks regarding the Mississippi flooding disaster. Email scams may contain links or attachments that may direct users to phishing or malicious websites. Fake antivirus attacks may come in the form of pop-ups that flash security warnings and ask the user for credit card information. Phishing emails and websites requesting donations for bogus charitable organizations commonly appear after these types of natural disasters.

Adobe Releases Flash Player and Flash Media Server Updates

Adobe has released updates for Flash Player and Flash Media Server to address multiple vulnerabilities. These vulnerabilities affect Adobe Flash Player 10.2.159.1 and earlier versions for Windows, Macintosh, Linux, and Solaris; Adobe Flash Player 10.2.157.51 and earlier versions for Android; Adobe Flash Media Server 4.0.1 and earlier versions; and Adobe Flash Media Server 3.5.5 and earlier versions for Windows and Linux. Exploitation of these vulnerabilities may allow an attacker to cause a denial-of-service condition or execute arbitrary code.

Google Releases Chrome 11.0.696.68

Google released Chrome 11.0.696.68 for Windows, Mac, Linux, and Chrome Frame to address multiple vulnerabilities. These vulnerabilities may allow an attacker to execute arbitrary code.

US-CERT encourages users and administrators to review the Google Chrome Releases blog entry and update to Chrome 11.0.696.68 to help mitigate the security risks. The Google Chrome blog entry may be temporarily unavailable. Google is currently working to fix the issue.