Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Vulnerabilities / Threats

A New Way to Beat Spam?

Georgia Tech researchers say they can detect spam at network level, bypassing spotty content-filtering schemes

You've tried blacklisting. And whitelisting. And half a dozen content-filtering tools. But every day, you and your users still paw through multiple spam messages, trying to find the stuff that's real email.

There's gotta be a better way, you say. And a couple of researchers at Georgia Tech think they've found it.

At the Association of Computing Machinery's annual Special Interest Group on Data Communication (SIGCOMM) yesterday, a Georgia Tech assistant professor and his doctoral student presented a paper that indicates it may be possible to detect and eradicate spam at the network layer, without using content filters.

In their paper, "Understanding the Network-Level Behavior of Spammers," Prof. Nick Feamster and Anirudh Ramachandran revealed the results of a 17-month study of more than 10 million spam messages sent over the Internet. The primary finding: Spam generally travels a different path on the network than real email.

The study found that most span is sent from a few regions of IP address space, and that spammers are using transient "bots" that send only a few pieces of email over a very short period of time.

"These trends suggest that developing algorithms to identify botnet membership, filtering email messages based on network-level properties (which are less variable than email content), and improving the security of the Internet routing infrastructure may prove to be extremely effective for combating spam," the paper says.

Security managers, email administrators and end users are constantly frustrated by content-based spam filters, which frequently block desired messages while allowing junk mail to accumulate in the user's mailbox. The problem, experts say, is that content filters generally use words and phrases to flag spam, and spammers can circumvent them by simply rewording or misspelling their messages.

The Georgia Tech researchers, on the other hand, studied IP addresses, routing paths and packet breakdown of spam messages to identify spam. "More than 10 percent of spam [in the study] originated from mail relays in two attack sources," the paper says, "and 36 percent of all received spam originated form only 20 attack sources. With a few exceptions, the attack sources containing hosts responsible for sending large quantities of spam differ from those sending large quantities of legitimate email."

Although the authors concede that theirs is only one study, the results raise the hope that anti-spam vendors will eventually be able to filter spam, at least in part, using its network characteristics as well as its content. If the researchers' principles hold up, they may pave the way for vendors to develop new, more accurate anti-spam tools.

— Tim Wilson, Site Editor, Dark Reading

Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
News
FluBot Malware's Rapid Spread May Soon Hit US Phones
Kelly Sheridan, Staff Editor, Dark Reading,  4/28/2021
Slideshows
7 Modern-Day Cybersecurity Realities
Steve Zurier, Contributing Writer,  4/30/2021
Commentary
How to Secure Employees' Home Wi-Fi Networks
Bert Kashyap, CEO and Co-Founder at SecureW2,  4/28/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you today!
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-31755
PUBLISHED: 2021-05-07
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.
CVE-2021-31756
PUBLISHED: 2021-05-07
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copie...
CVE-2021-31757
PUBLISHED: 2021-05-07
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setVLAN allows attackers to execute arbitrary code on the system via a crafted post request.
CVE-2021-31758
PUBLISHED: 2021-05-07
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setportList allows attackers to execute arbitrary code on the system via a crafted post request.
CVE-2021-31458
PUBLISHED: 2021-05-07
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handlin...