Growing infection rates from worm variants based on three virus families: Zotob, Bozori and Ircbot are putting large organizations on the alert around the world.

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MessageLabs is warning computer users to be on their guard against a new email using mass-mail social engineering techniques to dupe users into clicking on a malicious URL, which will open up PCs to unauthorised access.

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Last week Microsoft released a security alert that warned of a remote Denial of Service (DoS) condition in the Remote Desktop Protocol (RDP). RDP is disabled by default on most Windows versions, with the exception of Media Center. However, many organizations do enable it to aid in remote support.

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MessageLabs is warning computer users to be on their guard against a new variant of the Bagle downloader. MessageLabs has intercepted almost 70,000 copies already. The first copy was intercepted today at 13:24 GMT. 45,769 copies have been stopped in the last hour (1400-1500 GMT). The virus appears to have originated from a Yahoo group.

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NetSec has identified multiple remotely exploitable flaws that may negatively impact the security posture of systems worldwide. This alert is designed to increase awareness of a vulnerability affecting applications relying on the Computer Associates 'Vet' anti-virus library. The prevalence of security software products leveraging this component in corporate and government computing environments has increased the severity level to "High".

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A number of new variants of Email-Worm.Win32.Bagle have been detected today. They are new variants of the same malware only packed differently. They all have in common that they don't self-replicate. In other words, these are so-called intended variants, not fully functional versions. They have all been mass-mailed out deliberately as spam.

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