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Re: [tor-bugs] #22584 [Applications/Tor Browser]: More RWX memory pages for TBB on some Windows versions

#22584: More RWX memory pages for TBB on some Windows versions
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 Reporter:  arthuredelstein           |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-security              |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by cypherpunks):

 Replying to [comment:11 cypherpunks]:
 > Replying to [comment:9 arthuredelstein]:
 > > Replying to [comment:8 cypherpunks]:
 > > > TBB 7.5a1 on Win 7: 10 private RWX pages are observable.
 > > > {{{
 > > > │    │       ├──0.04 MB (00.00%) ── execute-readwrite(segments=1)
 > > > }}}
 > > >
 > > > {{{
 > > > 0x4260000, Private: Commit, 40 kB, RWX
 > > > }}}
 > >
 > > Thanks. Could you check what DLLs (or exe) these pages are associated
 with? VMMap will tell you (https://technet.microsoft.com/en-
 us/sysinternals/vmmap.aspx).
 > Well, it's a private block of the main firefox.exe process.
 In 7.5a4 content process has a similar block (with different data in it).
 Main process has another one 4K RWX private page.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22584#comment:14>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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