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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.

Microsoft Releases Security Advisory 2416728

Microsoft has released a security advisory to alert users of a vulnerability affecting ASP.NET. Exploitation of this vulnerability may allow an attacker to obtain sensitive information or tamper with data.

US-CERT encourages administrators to review Microsoft security advisory 2416728 and apply any necessary workarounds until a fix is released by the vendor.

Update: Microsoft has indicated that this vulnerability affects all applications that rely on the ASP.NET platform. Microsoft has also updated the security advisory to include additional workaround details. The Microsoft SharePoint Team has updated its blog entry "Security Advisory 2416728 (Vulnerability in ASP.NET) and SharePoint" to assist users in how to mitigate these risks in SharePoint.

US-CERT will provide additional information as it becomes available.

Mozilla Releases Firefox 3.5.13 and 3.6.10

The Mozilla Foundation has released Firefox 3.5.13 and 3.6.10 to address a stability issue affecting some users.

US-CERT encourages users and administrators to review the release notes for Firefox 3.5.13 and Firefox 3.6.10 and apply any necessary updates to mitigate the issue.

Apple Releases QuickTime 7.6.8

Apple has released QuickTime 7.6.8 to address two vulnerabilities affecting earlier versions of QuickTime for Windows.

The first vulnerability is due to improper input validation in the QuickTime ActiveX control. Exploitation of this vulnerability may allow an attacker to execute arbitrary code.

The second vulnerability is due to a path searching issue related to insecure loading of dynamic link libraries (DLLs). Exploitation of this vulnerability may allow an attacker to execute arbitrary code. Additional information regarding this class of vulnerabilities can be found in the US-CERT Current Activity entry titled "Insecure Loading of Dynamic Link Libraries in Windows Applications" and in the US-CERT Vulnerability Note VU#707943.

US-CERT encourages users and administrators to review Apple article HT4339 and apply any necessary updates to help mitigate the risks.

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