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Tell HN: Cisco WebEx on OS X uses the same pre-installer tricks as Zoom
673 points|mmastrac|5 years ago|180 comments
I noticed while installing WebEx today that the installer immediately terminated itself after popping up the pre-installation script.

Running `strings` on the installation plugin (CWSPkgPlugin.bundle) shows why - it's using a similar process to what Zoom does [1]

  +[CWSUtilBase unzip:to:]
  /usr/bin/unzip
  Clean up temp unziped app done: %i
  unzip:to:
  [...]
  Cisco Webex pkg plugin, begin init work.
  Install CWS result: %i
  Launch CWS result: %i
  Terminate installer: %@
  Terminate self: %@
  [...]
  /usr/sbin/lsof
  forceTerminate

Previously discussed here: https://news.ycombinator.com/item?id=22736608

[1] https://www.imore.com/zooms-preinstallation-script-workaroun...

Ask HN: Why does Zoom Desktop examine all processes and arguments?
547 points|neolog|4 years ago|263 comments
Looking at syscalls, I see Zoom desktop reads all processes and arguments.

    [pid 3844872] stat("/proc/1", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
    [pid 3844872] openat(AT_FDCWD, "/proc/1/stat", O_RDONLY) = 4
    [pid 3844872] openat(AT_FDCWD, "/proc/1/cmdline", O_RDONLY) = 4
    [pid 3844872] readlink("/proc/1/exe", 0x20c0520, 1024) = -1 EACCES (Permission denied)
    [pid 3844872] stat("/proc/2", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
    [pid 3844872] openat(AT_FDCWD, "/proc/2/stat", O_RDONLY) = 4
    [pid 3844872] openat(AT_FDCWD, "/proc/2/cmdline", O_RDONLY) = 4
    [pid 3844872] stat("/proc/3", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
    [pid 3844872] openat(AT_FDCWD, "/proc/3/stat", O_RDONLY) = 4
    [pid 3844872] openat(AT_FDCWD, "/proc/3/cmdline", O_RDONLY) = 4    
    ...

Why would it do that? Is there any way to prevent it?