Security experts have found security flaws in Adobe Acrobat and Adobe Reader software. They discovered pdf documents that can be used to launch malicious attacks on people's computers.

Security experts warned that hackers can take control of the vulnerable computers using the pdf documents. The users become the victims of malicious attacks, when they open the corrupted pdf documents. 

The eWeek. com Web site, on Tuesday, reported that on Monday, attackers infected some advertisements on the site, exploiting the security flaws in Adobe Reader and Adobe Acrobat, which has been identified as 'bloodhound. exploit. 213.' by Symantec. The eWeek. com and other Ziff Davis Enterprise sites were affected by security flaw. 

The eWeek. com reported that infected code was discovered early Feb. 24. The site stated that the infected ads were removed within a short time and the site working fine now.

Stephen Wellman, director of community and content for Ziff Davis Enterprise, said, "The exploit in question did not compromise eWEEK. com or any Ziff Davis Enterprise Web sites. The attack was served through an advertisement and took advantage of certain advertising-serving codes and was not our fault. This vulnerability has been removed from all of our Web sites and we are taking steps to ensure that this does not happen again."

According to the security experts, Adobe has been made aware of the security flaw, but it won't be releasing a fix for the problem until March 11th. So, until then, the people using Adobe Reader 9 and earlier versions, and Adobe Acrobat Standard, Pro, Pro Extended 9, and earlier versions are at risk.

Security experts have advised that until the flaw is fixed, Adobe Acrobat and Adobe Reader users should disable Javascript in Adobe. They should prevent internet explorer, or whatever browser they use, from automatically displaying pdf documents. And, they should be very suspicious of pdf documents.