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Apple patched the Mac and Windows versions of Safari, while Mozilla fixed a vulnerability in Firefox. Apple late Wednesday released an update to popular media player QuickTime, addressing 11 vulnerabilities that could be exploited by hackers to compromise PCs. Microsoft has warned users to be vigilant after the discovery of a series of attacks on Office.. Microsoft has issued a security advisory in response to reports that cybercriminals are using Word to exploit a vulnerability in the Jet Database Engine. Microsoft issued four "critical" patches, including one for the zero-day Excel vulnerability reported in January, in its March Patch Tuesday round of bug fixes. In all, the company corrected 12 vulnerabilities, all client-side problems associated with its Microsoft Office productivity suite. Sun Microsystems has released product updates to correct several "highly critical" vulnerabilities in its Java programming environment. PandaLabs researchers said they have discovered a public exploit taking advantage of a new vulnerability in Microsoft Access Database. Buffer overflows are at the heart of a series of attacks against Facebook and MySpace, security firm Fortify Software has warned.. Users are being urged to update their copies of Mozilla's Thunderbird and SeaMonkey email applications after the disclosure of a serious security flaw.. The number of vulnerability disclosures decreased in 2007 from the previous year for the first time, according to IBM’s latest Internet Security Systems (ISS) trend report. Apple on Wednesday released a new version of its QuickTime media player, patching a flaw in the application on both Windows and Mac OS X operating systems. Symantec has warned that a critical flaw in the ActiveX control of image uploaders that have been widely distributed to users of popular social networking sites Facebook and MySpace can be exploited by hackers to install malicious code on user's computers. Security experts are warning users to be vigilant after the disclosure of a new security vulnerability in RealPlayer.. An Italian researcher has identified a flaw in Apple's QuickTime media application that can allow an attacker to perform a DoS attack or take control of an affected PC. Researchers have discovered the first trojan for Apple's iPhone. End of year security round up from Cisco highlights seven key issues 2008 will usher in more security issues whose challenges can only be met by an array of security solutions. Now is the time to start thinking about your 2008 New Year's security resolutions. Apple has released a new version of its popular QuickTime application to close three holes, one of which is a particularly dangerous flaw that was being actively exploited to install malicious code on victims' machines. Targeted phishing emails are attempting to infect the machines of users' who are tricked into opening malicious Microsoft Access Database (MDB) files, US-CERT (United States Computer Emergency Readiness Team) said in a warning this week. Researchers today began noticing increased activity on ports directed to media players, a strong indication that attackers are actively screening machines for a new codec vulnerability reported over the weekend.