A botworm is targeting Symantec’s widely used web security products on corporate networks.
The "Big Yellow" worm has been reported by web security researcher and software provider eEye, and affects a range of Symantec’s Antivirus and Client Security products.
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The researcher said it had recently detected the new worm and that it is actively exploiting a remote Symantec vulnerability which was originally patched by Symantec this June.
Although the vulnerability had been exploited by some attackers last month, said eEye, Big Yellow was the first example of a worm leveraging this vulnerability for self-propagation.
To avoid being hit by the worm, businesses should make sure they have the latest versions of Symantec software installed, and block port tcp/2967 at the network gateway to minimise the attackable surface area, said eEye.
Symantec said it was aware of the problem but was not seeing widespread distribution of the worm, which seeks to take over networked computers and use them to spread the malware further.
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