Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 Replying to [comment:10 cypherpunks]:
 > So, that's due to Firefox doesn't recognize Win 10 renderer:
 > {{{
 > D3D11_COMPOSITING Blocklisted; failure code
 BLOCKLIST_FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR
 > }}}
 https://hg.mozilla.org/mozilla-
 
central/file/06ee65d8ccdef77673ccc43098525565a11ce370/widget/windows/GfxInfo.cpp#l1415
 `Microsoft Basic Render Driver` is a system device, therefore it doesn't
 have `VendorID`.
 Vendor lock by Mozilla. What a shame!
 > that changes the fingerprint and triggers:
 > {{{
 > Error: WebGL warning: Disallowing antialiased backbuffers due to
 blacklisting.  canvas.js:180:11
 > }}}
 There is a strong opinion to disable it everywhere:
 https://bugzilla.mozilla.org/show_bug.cgi?id=809550
 > Forcing MSAA fixes that error, but doesn't change the fingerprint.
 Bad Mozilla. You need two:
 "To force-enable WebGL, go to about:config and set webgl.force-
 enabled=true.
 To force-enable WebGL anti-aliasing, go to about:config and set webgl
 .msaa-force=true."
 https://wiki.mozilla.org/Blocklisting/Blocked_Graphics_Drivers
 #How_to_force-enable_blocked_graphics_features
 to finally get `224a8abee799ec6381e06293de4565f6`.

 Related issues (still not fixed):
 https://bugzilla.mozilla.org/show_bug.cgi?id=1429587
 https://bugzilla.mozilla.org/show_bug.cgi?id=1383295
 https://bugzilla.mozilla.org/show_bug.cgi?id=1419111

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 So, that's due to Firefox doesn't recognize Win 10 renderer:
 {{{
 D3D11_COMPOSITING Blocklisted; failure code
 BLOCKLIST_FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR
 }}}
 that changes the fingerprint and triggers:
 {{{
 Error: WebGL warning: Disallowing antialiased backbuffers due to
 blacklisting.  canvas.js:180:11
 }}}
 Forcing MSAA fixes that error, but doesn't change the fingerprint.

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by gk):

 Replying to [comment:8 cypherpunks]:
 > o_0 `WebGL 1 Driver Renderer` obviously.

 `ANGLE (ATI Mobility Radeon HD 5650 Direct3D11 vs_5_0 ps_5_0)` is shown
 for the bare metal Windows 7 version
 `ANGLE (Software Adapter Direct3D11 vs_5_0 ps_5_0)` is shown for the
 Windows 7 VM
 `ANGLE (Microsoft Basic Render Driver Direct3D11 vs_5_0 ps_5_0)` is shown
 for the Windows 10 VM

 (all three of them are on the same laptop)

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 o_0 `WebGL 1 Driver Renderer` obviously.

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by gk):

 Replying to [comment:2 cypherpunks]:
 > Replying to [comment:1 gk]:

 [snip]

 > > So, it seems we have at least a fingerprint difference between major
 Windows versions (+ the OS difference). I wonder where this is coming
 from...
 > What is your renderer on Win 7? I got the same results on `Software
 Adapter Direct3D11 vs_5_0 ps_5_0`.

 Where did you find that string? If on `about:support` what's the attribute
 I've to check?

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 Replying to [comment:2 cypherpunks]:
 > Replying to [comment:1 gk]:
 > > comment:2:ticket:30531 reported `6992168724b997c74fc89f1e4a9301ce` (I
 guess that's a Windows 10 system?)
 > Yes, the latest.
 > > I got the same on a Windows 10 system inside Virtualbox.
 > On every config without anti-aliasing support.
 > > On a Windows 7 system both inside Virtualbox and on bare metal I get
 `224a8abee799ec6381e06293de4565f6`.
 And on the same Windows 10 system with hardware-accelerated renderer.
 (Although, it has `ADVANCED_LAYERS broken by env: Failed to render sanity
 test`.)

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by Thorin):

 > I wonder what version you tested with in
 ​https://bugzilla.mozilla.org/show_bug.cgi?id=1428034#c7

 I now realize this is to do with this ticket, not the new readPIxels one.
 That was 8.5a10, which I just retested, and I now get
 `224a8abee799ec6381e06293de4565f6` - so it's a panopticlick code change

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by gk):

 Replying to [comment:3 Thorin]:

 [snip]

 > **Please advise**: I was going to open another ticket when I had done
 some more testing, but **readPixels** is not covered by RFP (see
 https://bugzilla.mozilla.org/show_bug.cgi?id=1428034 ) and using my tests
 [1], on windows I get entropy. Not sure if unique or just OS.

 Yes, could you please open another ticket for the `readPixels` issue? I
 wonder what version you tested with in
 https://bugzilla.mozilla.org/show_bug.cgi?id=1428034#c7. Given that it is
 from a month ago and we did not change anything substantially for a while
 now regarding our WebGL fingerprinting behavior that's a bit puzzling (we
 removed WebGL only as click-to-play from default Tor Browser mode).

 > - Windows 7 32bit
 `2ba61e7e8e370fdbcefb79456e7e944b060f34289af33732aa6eb75af61ff06c`
 > - Windows 7 64bit
 `ac9aa378cd16219ecbcb6ec46b57d8a484ac8ad61cbe63c810b40fb2c741e7f3`
 > - Windows10 64bit
 `c4ef81818ccaca2c4933f63c45bf5ffaaa7f2233f2761e3c6ba14a9e5cb82c25`
 >
 > It seems to be consistent on Linux, and Mac i have no idea: here's some
 data
 > - Mint Cinnamon 32/64bit `not supported`
 > - Ubuntu GNOME
 `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329`
 > - Debian GNOME
 `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329`
 > - Mac 10.14
 `96f2538daa8a0a180f77a13d80ad455a75ae17c5495ce90fa4fd4267cbfd5210`

 Interestingly, I get your macOS one on one of my Linux boxes.

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by Thorin):

 **FWIW**:

 Win 7 64bit (bare metal) just 8.5a12 64bit
 - `224a8abee799ec6381e06293de4565f6`
 - 2x Error: WebGL warning: Exceeded 16 live WebGL contexts...

 Win 7 32bit (VM)
 - `224a8abee799ec6381e06293de4565f6`
 - 17x Error: WebGL warning: Disallowing antialiased backbuffers due to
 blacklisting
 - then 1x Error: WebGL warning: Exceeded 16 live WebGL contexts...
 - then 1x Error: WebGL warning: Disallowing antialiased backbuffers...
 - repeat the last two lines about a dozen times

 Win10 64bit (VM) 8.5.a12 64bit & 32bit
 - `6992168724b997c74fc89f1e4a9301ce`
 - a plethora of errors

 ---

 **Please advise**: I was going to open another ticket when I had done some
 more testing, but **readPixels** is not covered by RFP (see
 https://bugzilla.mozilla.org/show_bug.cgi?id=1428034 ) and using my tests
 [1], on windows I get entropy. Not sure if unique or just OS.

 - Windows 7 32bit
 `2ba61e7e8e370fdbcefb79456e7e944b060f34289af33732aa6eb75af61ff06c`
 - Windows 7 64bit
 `ac9aa378cd16219ecbcb6ec46b57d8a484ac8ad61cbe63c810b40fb2c741e7f3`
 - Windows10 64bit
 `c4ef81818ccaca2c4933f63c45bf5ffaaa7f2233f2761e3c6ba14a9e5cb82c25`

 It seems to be consistent on Linux, and Mac i have no idea: here's some
 data
 - Mint Cinnamon 32/64bit `not supported`
 - Ubuntu GNOME
 `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329`
 - Debian GNOME
 `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329`
 - Mac 10.14
 `96f2538daa8a0a180f77a13d80ad455a75ae17c5495ce90fa4fd4267cbfd5210`

 So besides windows OS entropy, theres at least two buckets for Linux?

 [1] https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#canvas

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 Replying to [comment:1 gk]:
 > comment:2:ticket:30531 reported `6992168724b997c74fc89f1e4a9301ce` (I
 guess that's a Windows 10 system?)
 Yes, the latest.
 > I got the same on a Windows 10 system inside Virtualbox.
 On every config without anti-aliasing support.
 > On a Windows 7 system both inside Virtualbox and on bare metal I get
 `224a8abee799ec6381e06293de4565f6`.
 BTW, the test gives a lot of
 {{{
 Error: WebGL warning: Exceeded 16 live WebGL contexts for this principal,
 losing the least recently used one.
 }}}
 > So, it seems we have at least a fingerprint difference between major
 Windows versions (+ the OS difference). I wonder where this is coming
 from...
 What is your renderer on Win 7? I got the same results on `Software
 Adapter Direct3D11 vs_5_0 ps_5_0`.

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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-+-
 Reporter:  gk   |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  new
 Priority:  High |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-fingerprinting, tbb- |  Actual Points:
  fingerprinting-os  |
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by gk):

 * keywords:  tbb-fingerprinting => tbb-fingerprinting, tbb-fingerprinting-
   os


Comment:

 comment:2:ticket:30531 reported `6992168724b997c74fc89f1e4a9301ce` (I
 guess that's a Windows 10 system?)

 I got the same on a Windows 10 system inside Virtualbox. On a Windows 7
 system both inside Virtualbox and on bare metal I get
 `224a8abee799ec6381e06293de4565f6`. All three test results are collected
 on the same laptop.

 So, it seems we have at least a fingerprint difference between major
 Windows versions (+ the OS difference). I wonder where this is coming
 from...

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[tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)

[Tor Bug Tracker & Wiki]

#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
--+
 Reporter:  gk|  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  High  |  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal|   Keywords:  tbb-fingerprinting
Actual Points:|  Parent ID:
   Points:|   Reviewer:
  Sponsor:|
--+
 This is a spin-off of #30531 where it got realized that the Windows WebGL
 fingerprint measured e.g. by Pantopiclick is different from the Linux
 one(s).

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