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.
US-CERT is aware of public reports of malicious code circulating via spam email messages impersonating the Department of Homeland Security (DHS). The attacks arrive via unsolicited email messages that may contain subject lines related to DHS or other government activity. These messages may contain a link or attachment. If users click on this link or open the attachment, they may be infected with malicious code, including the Zeus Trojan.
US-CERT encourages users and administrators to take the following measures to protect themselves:
- Do not follow unsolicited web links or attachments in email messages.
- Maintain up-to-date antivirus software.
- Refer to Cyber Security Tip ST04-014 - Avoiding Social Engineering and Phishing Attacks
- Refer to the Recognizing and Avoiding Email Scams (pdf) document for more information on avoiding email scams.
Apple has released Safari 4.0.5 to address multiple vulnerabilities in ColorSync, ImageIO, PubSub, Safari, and WebKit. These vulnerabilities may allow a remote attacker to execute arbitrary code, cause a denial-of-service condition, obtain sensitive information, or bypass security restrictions.
US-CERT encourages users and administrators to review Apple article HT4070 and upgrade to Safari 4.0.5 to help mitigate the risks.
Microsoft has released an update to address vulnerabilities in Microsoft Windows and Office as part of the Microsoft Security Bulletin Summary for March 2010. These vulnerabilities may allow an attacker to execute arbitrary code.
US-CERT encourages users and administrators to review the bulletins and follow best-practice security policies to determine which updates should be applied.