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epriestley e44b40ca4d Make "Subscribe/Unsubscribe" require only "CAN_VIEW", not "CAN_INTERACT"
Summary:
Ref T13249. See PHI1059. Currently, Subscribe/Unsubscribe require CAN_INTERACT via the web UI and no permissions (i.e., effectively CAN_VIEW) via the API.

Weaken the requirements from the web UI so that you do not need "CAN_INTERACT". This is a product change to the effect that it's okay to subscribe/unsubscribe from anything you can see, even hard-locked tasks. This generally seems reasonable.

Increase the requirements for the actual transaction, which mostly applies to API changes:

  - To remove subscribers other than yourself, require CAN_EDIT.
  - To add subscribers other than yourself, require CAN_EDIT or CAN_INTERACT. You may have CAN_EDIT but not CAN_INTERACT on "soft locked" tasks. It's okay to click "Edit" on these, click "Yes, override lock", then remove subscribers other than yourself.

This technically plugs some weird, mostly theoretical holes in the API where "attackers" could sometimes make more subscription changes than they should have been able to. Now that we send you email when you're unsubscribed this could only really be used to be mildly mischievous, but no harm in making the policy enforcement more correct.

Test Plan: Against normal, soft-locked, and hard-locked tasks: subscribed, unsubscribed, added and removed subscribers, overrode locks, edited via API. Everything worked like it should and I couldn't find any combination of lock state, policy state, and edit pathway that did anything suspicious.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13249

Differential Revision: https://secure.phabricator.com/D20174
2019-02-19 10:52:34 -08:00
bin Remove dead symlink 2019-01-10 16:27:45 -08:00
conf Remove an old digest in Celerity code and some obsolete configuration options 2019-01-04 13:43:38 -08:00
externals Update the "SES" and "sendmail" mailers for the new API; remove "encoding" 2019-01-16 13:18:55 -08:00
resources Allow task statuses to specify that either "comments" or "edits" are "locked" 2019-02-15 19:18:40 -08:00
scripts Remove "iconv" PHP extension dependency 2019-01-30 19:46:58 -08:00
src Make "Subscribe/Unsubscribe" require only "CAN_VIEW", not "CAN_INTERACT" 2019-02-19 10:52:34 -08:00
support Improve top-level fatal exception handling in PHP 7+ 2019-02-11 15:05:15 -08:00
webroot Allow task statuses to specify that either "comments" or "edits" are "locked" 2019-02-15 19:18:40 -08:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Begin adding test coverage to GitHub Events API parsers 2016-03-09 09:30:07 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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