Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:  fixed
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 Replying to [comment:18 arthuredelstein]:
 > Replying to [comment:17 gk]:
 > > Replying to [comment:14 cypherpunks]:
 > > > Replying to [comment:13 gk]:
 > > > Why are you so hurry about closing ticket about long-standing
 security problem?
 > >
 > > Because we fixed the particular issue this ticket was about.
 > >
 > > > No conclusions about issues in comment:7 (from comment:4) were made,
 even a comment.
 > > > There is some feeling that it's not enough for reopening the ticket
 (for you), so:
 > > > `softokn3.dll` and `freebl3.dll` have `W^X` pages on Windows 10
 (15063).
 > >
 > > Could you open follow-up tickets for these problems please with steps
 to reproduce for us? Thanks.
 >
 > I opened #22584. I wonder if the person who observed this could comment
 if it was necessary to visit any particular websites to trigger these RWX
 pages.
 OK, as you show you're interested in solving these issues, and don't close
 tickets without explanations or follow-ups as somebody else, then I'll put
 comments in that ticket.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:  fixed
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by arthuredelstein):

 Replying to [comment:17 gk]:
 > Replying to [comment:14 cypherpunks]:
 > > Replying to [comment:13 gk]:
 > > Why are you so hurry about closing ticket about long-standing security
 problem?
 >
 > Because we fixed the particular issue this ticket was about.
 >
 > > No conclusions about issues in comment:7 (from comment:4) were made,
 even a comment.
 > > There is some feeling that it's not enough for reopening the ticket
 (for you), so:
 > > `softokn3.dll` and `freebl3.dll` have `W^X` pages on Windows 10
 (15063).
 >
 > Could you open follow-up tickets for these problems please with steps to
 reproduce for us? Thanks.

 I opened #22584. I wonder if the person who observed this could comment if
 it was necessary to visit any particular websites to trigger these RWX
 pages.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:  fixed
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by gk):

 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 Replying to [comment:14 cypherpunks]:
 > Replying to [comment:13 gk]:
 > Why are you so hurry about closing ticket about long-standing security
 problem?

 Because we fixed the particular issue this ticket was about.

 > No conclusions about issues in comment:7 (from comment:4) were made,
 even a comment.
 > There is some feeling that it's not enough for reopening the ticket (for
 you), so:
 > `softokn3.dll` and `freebl3.dll` have `W^X` pages on Windows 10 (15063).

 Could you open follow-up tickets for these problems please with steps to
 reproduce for us? Thanks.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:
 |  reopened
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by arthuredelstein):

 Replying to [comment:13 gk]:

 > Arthur: I wonder whether we should make an argument on the Mozilla
 ticket for getting this included into esr52? It feels to me all Windows
 users should benefit from this security enhancement.

 Good suggestion -- I put in a request:
 https://bugzilla.mozilla.org/show_bug.cgi?id=1344034#c9

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:
 |  reopened
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 Also `tor.exe` on the same machine has something strange in memory:
 {{{
 0x7ffcab38b000, Private: Reserved, 13 971 860 kB,
 0x7fff, Private: Reserved, 137 422 882 560 kB,
 }}}
 It looks related to #22255.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:
 |  reopened
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by cypherpunks):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 Replying to [comment:13 gk]:
 Why are you so hurry about closing ticket about long-standing security
 problem?
 No conclusions about issues in comment:7 (from comment:4) were made, even
 a comment.
 There is some feeling that it's not enough for reopening the ticket (for
 you), so:
 `softokn3.dll` and `freebl3.dll` have `W^X` pages on Windows 10 (15063).

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:  fixed
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by gk):

 * status:  needs_review => closed
 * resolution:   => fixed


Comment:

 Nice work (as dmajor already said)! Applied to `tor-
 browser-52.2.0esr-7.5-1` (commit
 dda0385cc49240f8bd115476c870d61863741f4c).

 Arthur: I wonder whether we should make an argument on the Mozilla ticket
 for getting this included into esr52? It feels to me all Windows users
 should benefit from this security enhancement.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:
 |  needs_review
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by arthuredelstein):

 Replying to [comment:5 cypherpunks]:
 > RWX pages in Tor and its ssleay32.dll, libeay32.dll, zlib1.dll don't
 bother you?

 Thanks for reporting these; I opened #22563.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
-+-
 Reporter:  arthuredelstein  |  Owner:  tbb-
 |  team
 Type:  defect   | Status:
 |  needs_review
 Priority:  Medium   |  Milestone:
Component:  Applications/Tor Browser |Version:
 Severity:  Normal   | Resolution:
 Keywords:  tbb-security, TorBrowserTeam201706R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by arthuredelstein):

 * keywords:  tbb-security => tbb-security, TorBrowserTeam201706R
 * status:  needs_information => needs_review


Comment:

 Here's my Mozilla patch, rebased onto tor-browser-52.2.0esr-7.5-1, for
 review:

 https://github.com/arthuredelstein/tor-browser/commit/21617

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+---
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  needs_information
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:  tbb-security  |  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+---

Comment (by arthuredelstein):

 I submitted a patch here:
 https://bugzilla.mozilla.org/show_bug.cgi?id=1344034#c4

 I expect it will be straightforward to backport to TBB/ESR52. I'll wait
 for Mozilla's review before doing that.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+---
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  needs_information
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:  tbb-security  |  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+---

Comment (by cypherpunks):

 Replying to [comment:6 arma]:
 > This sure does seem like an issue.
 >
 > Is there some patch we could apply locally, while we wait for the
 Firefox people to get their act together?
 >
 > Or maybe this is a good bite-sized bug to ask the Internet to help
 Firefox with?
 What Firefox? It's tor.exe itselft and libs, Tor Expert Bundle for
 Windows.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+---
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  needs_information
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:  tbb-security  |  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+---

Comment (by arthuredelstein):

 Replying to [comment:3 cypherpunks]:
 > https://dxr.mozilla.org/mozilla-
 esr52/search?q=PAGE_EXECUTE_READWRITE&redirect=false
 > What about disabling ctypes?

 This was a good suggestion. I tried it but the RWX page was still present.
 My next plan is to systematically check all the allocate and reprotect
 calls. Possibly this is best done by hooking the system calls, especially
 because this might be the result of a library call.

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+---
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  needs_information
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:  tbb-security  |  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+---
Changes (by cypherpunks):

 * keywords:   => tbb-security
 * status:  new => needs_information


Comment:

 Could somebody ask MS to fix Windows 7?
 {{{
 Address TypeSizeCommit  Private Blocks  Protection
 Details
 68CDImage (ASLR)964 964 200 6
 Execute/Read/Write  C:\Windows\System32\msmpeg2adec.dll
   68CD  Image (ASLR)4   4   Read
 Header
   68CD1000  Image (ASLR)736 736 8
 Execute/Read.text
   68D89000  Image (ASLR)100 100
 Execute/ReadRT_CODE
   68DA2000  Image (ASLR)80  80  80
 Execute/Read/Write  .data
   68DB6000  Image (ASLR)12  12  12  Read/Write
 .data
   68DB9000  Image (ASLR)4   4   4   Copy on
 write   .data
   68DBA000  Image (ASLR)4   4   4   Copy on
 write   RT_DATA
   68DBB000  Image (ASLR)4   4   Read
 .rsrc
   68DBC000  Image (ASLR)20  20  Read
 .reloc
 68E5Image (ASLR)3 148   3 148   188 8
 Execute/Read/Write  C:\Windows\System32\mf.dll
   68E5  Image (ASLR)4   4   Read
 Header
   68E51000  Image (ASLR)2 884   2 884   4
 Execute/Read.text
   69122000  Image (ASLR)40  40
 Execute/ReadRT_CODE
   6912C000  Image (ASLR)44  44  44
 Execute/Read/Write  .data
   69137000  Image (ASLR)16  16  16  Read/Write
 .data
   6913B000  Image (ASLR)4   4   4   Copy on
 write   .data
   6913C000  Image (ASLR)28  28  28  Read/Write
 .data
   69143000  Image (ASLR)4   4   4   Copy on
 write   RT_DATA
   69144000  Image (ASLR)16  16  Read
 .rsrc
   69148000  Image (ASLR)108 108 Read
 .reloc
 }}}

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by arma):

 This sure does seem like an issue.

 Is there some patch we could apply locally, while we wait for the Firefox
 people to get their act together?

 Or maybe this is a good bite-sized bug to ask the Internet to help Firefox
 with?

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by cypherpunks):

 RWX pages in Tor and its ssleay32.dll, libeay32.dll, zlib1.dll don't
 bother you?

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by cypherpunks):

 {{{
 ├451.92 MB (22.07%) -- commit
 │├──122.20 MB (05.97%) -- image
 ││  └───14.77 MB (00.72%) -- (4 tiny)
 ││  ├───0.98 MB (00.05%) ── execute-writecopy [48]
 ││  └───0.44 MB (00.02%) ── execute-readwrite [48]
 }}}

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by cypherpunks):

 https://dxr.mozilla.org/mozilla-
 esr52/search?q=PAGE_EXECUTE_READWRITE&redirect=false
 What about disabling ctypes?

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by arthuredelstein):

 I opened a Mozilla bug to track this issue in Firefox:
 https://bugzilla.mozilla.org/show_bug.cgi?id=1344034

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Re: [tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by arthuredelstein):

 I see a similar single RWX page in Firefox 51.0.1 on Windows. So it's not
 special to Tor Browser.

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[tor-bugs] #21617 [Applications/Tor Browser]: RWX page observed on Windows

[Tor Bug Tracker & Wiki]

#21617: RWX page observed on Windows
--+--
 Reporter:  arthuredelstein   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal|   Keywords:
Actual Points:|  Parent ID:
   Points:|   Reviewer:
  Sponsor:|
--+--
 With the #21514 patch applied, I observed a single RWX page on Windows. It
 would be good to track this down and fix it.

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