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.

Risk

11/23/2010
12:13 PM
George V. Hulme
George V. Hulme
Commentary
50%
50%

Sophos Sees Macs OS Infected With Windows Sludge

Anti-virus firm Sophos shows that while Macs may be under increasing malware threats, most of the sludge its anti-virus software found targeted Windows systems - Apple users aren't out of the woods.

Anti-virus firm Sophos shows that while Macs may be under increasing malware threats, most of the sludge its anti-virus software found targeted Windows systems - Apple users aren't out of the woods.Sophos has been giving away free anti-virus software for Mac users for a number of weeks now. The company claims to have more than 150,000 active users, and has sampled nearly 50,000 infection reports, from November 2 through November 16th.

Many of the malicious programs found in that analysis, not surprisingly, are Windows-specific attacks that Mac users are getting inadvertently. Perhaps by visiting infected Web sites and having the malware dropped into their browser caches, opening e-mail attachments, or by sharing and copying files by USB drives and other means.

Some of the malware are cross platform attacks, based on Java, while a few are Mac specific. From Sophos' blog late last week:

You'll also notice a lot of Java-based attacks in the list, these are obviously cross-platform and may have been found in internet caches by users who were hit by a drive-by attack. Many of these might have been designed to download further Windows-based attacks to computers, but they could easily be adapted to download Mac-based threats too.

You'll also see some Mac OS X-specific malware in there (OSX/Jahlav and DNS Changer). These are well known Mac Trojans that are typically disguised by hackers on BitTorrent sites, or planted on websites as alluring downloads or plugins to view videos.

Does this mean Mac users should rush out and install anti-virus software on their systems? Probably not. That is unless they are undertaking known risky activities such as visiting BitTorrents and downloading or viewing questionable software.

That means anti-virus software today is still a choice Mac users have to make, balancing risk and convenience. However, as Mac-based viruses grow in complexity, numbers, and efficiency - it's a luxury that may be lost soon.

The only caveat I'd have to that is that if your Mac is on a local network, your local users could be placing you at increased risk. So keep that in mind.

For my security and technology observations throughout the day, find me on Twitter.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 9/25/2020
Hacking Yourself: Marie Moe and Pacemaker Security
Gary McGraw Ph.D., Co-founder Berryville Institute of Machine Learning,  9/21/2020
Startup Aims to Map and Track All the IT and Security Things
Kelly Jackson Higgins, Executive Editor at Dark Reading,  9/22/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15208
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, when determining the common dimension size of two tensors, TFLite uses a `DCHECK` which is no-op outside of debug compilation modes. Since the function always returns the dimension of the first tensor, malicious attackers can ...
CVE-2020-15209
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one....
CVE-2020-15210
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, if a TFLite saved model uses the same tensor as both input and output of an operator, then, depending on the operator, we can observe a segmentation fault or just memory corruption. We have patched the issue in d58c96946b and ...
CVE-2020-15211
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, saved models in the flatbuffer format use a double indexing scheme: a model has a set of subgraphs, each subgraph has a set of operators and each operator has a set of input/output tensors. The flatbuffer format uses indices f...
CVE-2020-15212
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 2.2.1 and 2.3.1, models using segment sum can trigger writes outside of bounds of heap allocated buffers by inserting negative elements in the segment ids tensor. Users having access to `segment_ids_data` can alter `output_index` and then write to outside of `outpu...