this post was submitted on 11 Aug 2023
90 points (88.8% liked)

Lemmy

12546 readers
25 users here now

Everything about Lemmy; bugs, gripes, praises, and advocacy.

For discussion about the lemmy.ml instance, go to !meta@lemmy.ml.

founded 4 years ago
MODERATORS
 

Note: This post now archived and as such no longer works

An external image showing your user-agent and the total "hit count"

you are viewing a single comment's thread
view the rest of the comments
[–] andscape@feddit.it 7 points 1 year ago (2 children)

Can countermeasures be implemented in the clients to mitigate privacy risks, while not having to proxy images?

[–] flathead@quex.cc 3 points 1 year ago (1 children)

no. the remote server will log the requests based on the client address. it is a good argument for using a vpn.

[–] andscape@feddit.it 1 points 1 year ago* (last edited 1 year ago) (1 children)

Oh I mean, sure, but I don't think IP logging is the main privacy concern with spy pixels.

I'm assuming this trick uses the user agent string and other request metadata to identify clients. Even if it didn't recognize Jerboa as a client, it did guess that I was on mobile. That's not possible just by tracking IPs, unless they're cross-referencing it with other datasets. Also, I was on VPN anyway, so the IP would have been useless.

It should be possible for clients to obfuscate/fake the metadata of image requests to make tracking with spy pixels less effective.

[–] TriLinder@lemmy.ml 1 points 1 year ago

Yup, I'm parsing the user agent with the user_agents Python library.

[–] psud@aussie.zone 2 points 1 year ago (1 children)

At it's basic level it will capture your IP address, but it won't really tie the IP to a user name, and there's not a role lot you can do with it

Attacks I can think of:

  • target advertising at users in a particular lemmy community
  • get a collection of IP addresses of people with specific problems or beliefs (indicated by membership in a lemmy community) to target with malware

A VPN would protect you in this case, but you need to be a bit of a privacy nut to also protect yourself from things that identify for advertising right now

[–] TriLinder@lemmy.ml 1 points 1 year ago* (last edited 1 year ago) (1 children)

If you wanted to target a specific user, you could always send a DM with the image

[–] psud@aussie.zone 1 points 1 year ago

You could also correlate time of your log entry to order of comments sorted by new, with errors from the few clients that don't load images