The antivirus company said that its Anti-Virus engine version 3.78, when used in qmail servers, may pass Delivery Status Notification messages with the worm body intact, which the AV software will not detect.
Under other circumstances, the software can enter an infinite loop when scanning some emails.
The company has released patches for several affected products.
http://www.sophos.com/support/news/#mime-378
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iTnews Executive Retreat - Security Leaders Edition
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