5 ms·

Unbelievable, I can't understand how people haven't noticed that. "Wow I crop an image and it doesnt get smaller WTF???" Man if I ran Windows 11 to think I mig

Unbelievable, I can't understand how people haven't noticed that. "Wow I crop an image and it doesnt get smaller WTF???" Man if I ran Windows 11 to think I might be the one who stumbled on this 0-day first....

escapecharacter 4y ago
Compression ratios vary between different tools, I wouldn’t expect an image file size to scale at all smoothly with its resolution
- pdntspa 4y ago
  Yes, but that is not going to explain how a large crop eliminating 90% of the image area is not going to shrink the filesize more than a little bit
  - Dylan16807 4y ago
    That only matters if you check the size before and after.
malka 4y ago
Most of the time theses images don't end up in the file system. They are going to the clipboard and then copied to a chat or imgur
- e4e5 4y ago
  But in this case it's luckily not vulnerable
  - TonyTrapp 4y ago
    Apparently Discord and probably other platforms don't remove the excess data at the end of the file. Maybe they will start doing that now. But for all the existing cropped screenshots out there, it definitely means that there is a vulnerability.
    - shawnz 4y ago
      Does the system clipboard API also preserve the excess data, though?
      - banana_giraffe 4y ago
        Nope, or at least, not through any obvious paths I've ever seen, including testing just now. Also, both discord and imgur trimmed an image I uploaded to just the image data. Slack did not, however. I certainly wouldn't want to rely on that behavior, though.
    - saagarjha 4y ago
      They’ve started doing this.
rs999gti 4y ago
> Unbelievable, I can't understand how people haven't noticed that. "Wow I crop an image and it doesnt get smaller WTF???" Most people are not super techie computer users.
- deleted 4y ago
  [deleted]
- pdntspa 4y ago
  Yeah, it's pathetic. Still... you don't need MOST people. You need ONE, with a blog or a youtube account. And it took how long?
  - asdff 4y ago
    Every techie person I know who deals with windows has not dared to move to windows 11 so far, so I'm not too to surprised. I looked it up and the data matches my anecdote, only 18% of windows users are on 11, almost 70% on windows 10. https://www.extremetech.com/computing/342819-windows-11-gains-market-share-but-windows-10-still-leads-by-a-mile https://www.extremetech.com/computing/342819-windows-11-gain...
    - layer8 4y ago
      The Windows 10 Snip & Sketch has the same problem though.
ben0x539 4y ago
(As a non web-dev, maybe, )I don't think I've cared about the file size of cropped images in the past couple years. When I crop stuff it's because I want to send it to someone, not because I'm gonna archive it or anything.

escapecharacter 4y ago

Compression ratios vary between different tools, I wouldn’t expect an image file size to scale at all smoothly with its resolution

pdntspa 4y ago
Yes, but that is not going to explain how a large crop eliminating 90% of the image area is not going to shrink the filesize more than a little bit
- Dylan16807 4y ago
  That only matters if you check the size before and after.

malka 4y ago

Most of the time theses images don't end up in the file system. They are going to the clipboard and then copied to a chat or imgur

e4e5 4y ago
But in this case it's luckily not vulnerable
- TonyTrapp 4y ago
  Apparently Discord and probably other platforms don't remove the excess data at the end of the file. Maybe they will start doing that now. But for all the existing cropped screenshots out there, it definitely means that there is a vulnerability.
  - shawnz 4y ago
    Does the system clipboard API also preserve the excess data, though?
    - banana_giraffe 4y ago
      Nope, or at least, not through any obvious paths I've ever seen, including testing just now. Also, both discord and imgur trimmed an image I uploaded to just the image data. Slack did not, however. I certainly wouldn't want to rely on that behavior, though.
  - saagarjha 4y ago
    They’ve started doing this.

rs999gti 4y ago

> Unbelievable, I can't understand how people haven't noticed that. "Wow I crop an image and it doesnt get smaller WTF???" Most people are not super techie computer users.

deleted 4y ago
[deleted]
pdntspa 4y ago
Yeah, it's pathetic. Still... you don't need MOST people. You need ONE, with a blog or a youtube account. And it took how long?
- asdff 4y ago
  Every techie person I know who deals with windows has not dared to move to windows 11 so far, so I'm not too to surprised. I looked it up and the data matches my anecdote, only 18% of windows users are on 11, almost 70% on windows 10. https://www.extremetech.com/computing/342819-windows-11-gains-market-share-but-windows-10-still-leads-by-a-mile https://www.extremetech.com/computing/342819-windows-11-gain...
  - layer8 4y ago
    The Windows 10 Snip & Sketch has the same problem though.

ben0x539 4y ago

(As a non web-dev, maybe, )I don't think I've cared about the file size of cropped images in the past couple years. When I crop stuff it's because I want to send it to someone, not because I'm gonna archive it or anything.