1
0
Fork 0
mirror of https://we.phorge.it/source/phorge.git synced 2024-12-23 05:50:55 +01:00
No description
Find a file
epriestley 46052878b1 Bind MFA challenges to particular workflows, like signing a specific Legalpad document
Summary:
Depends on D19888. Ref T13222. When we issue an MFA challenge, prevent the user from responding to it in the context of a different workflow: if you ask for MFA to do something minor (award a token) you can't use the same challenge to do something more serious (launch nukes).

This defuses highly-hypothetical attacks where the attacker:

  - already controls the user's session (since the challenge is already bound to the session); and
  - can observe MFA codes.

One version of this attack is the "spill coffee on the victim when the code is shown on their phone, then grab their phone" attack. This whole vector really strains the bounds of plausibility, but it's easy to lock challenges to a workflow and it's possible that there's some more clever version of the "spill coffee" attack available to more sophisticated social engineers or with future MFA factors which we don't yet support.

The "spill coffee" attack, in detail, is:

  - Go over to the victim's desk.
  - Ask them to do something safe and nonsuspicious that requires MFA (sign `L123 Best Friendship Agreement`).
  - When they unlock their phone, spill coffee all over them.
  - Urge them to go to the bathroom to clean up immediately, leaving their phone and computer in your custody.
  - Type the MFA code shown on the phone into a dangerous MFA prompt (sign `L345 Eternal Declaration of War`).
  - When they return, they may not suspect anything (it would be normal for the MFA token to have expired), or you can spill more coffee on their computer now to destroy it, and blame it on the earlier spill.

Test Plan:
  - Triggered signatures for two different documents.
  - Got prompted in one, got a "wait" in the other.
  - Backed out of the good prompt, returned, still prompted.
  - Answered the good prompt.
  - Waited for the bad prompt to expire.
  - Went through the bad prompt again, got an actual prompt this time.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13222

Differential Revision: https://secure.phabricator.com/D19889
2018-12-18 12:06:16 -08:00
bin Add a bin/herald test ... for doing test runs via the CLI 2018-11-15 15:48:52 -08:00
conf Support "ssl.chain" in Aphlict configuration 2016-04-14 10:41:21 -07:00
externals Add profile images to Repositories 2017-06-12 07:51:39 -07:00
resources Bind MFA challenges to particular workflows, like signing a specific Legalpad document 2018-12-18 12:06:16 -08:00
scripts Add a bin/herald test ... for doing test runs via the CLI 2018-11-15 15:48:52 -08:00
src Bind MFA challenges to particular workflows, like signing a specific Legalpad document 2018-12-18 12:06:16 -08:00
support Use phutil_microseconds_since(...) to simplify some timing arithmetic 2018-11-08 16:46:32 -08:00
webroot Fix a bad method call signature throwing exceptions in newer Node 2018-12-10 16:01:00 -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

Phabricator is a collection of web applications which help software companies build better software.

Phabricator includes applications for:

  • reviewing and auditing source code;
  • hosting and browsing repositories;
  • tracking bugs;
  • managing projects;
  • conversing with team members;
  • assembling a party to venture forth;
  • writing stuff down and reading it later;
  • hiding stuff from coworkers; and
  • also some other things.

You can learn more about the project (and find links to documentation and resources) at Phabricator.org

Phabricator is developed and maintained by Phacility.


SUPPORT RESOURCES

For resources on filing bugs, requesting features, reporting security issues, and getting other kinds of support, see Support Resources.

NO PULL REQUESTS!

We do not accept pull requests through GitHub. If you would like to contribute code, please read our Contributor's Guide.

LICENSE

Phabricator is released under the Apache 2.0 license except as otherwise noted.