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user_status "last statuses" widget leaks account names #27122

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doobry-systemli opened this issue May 26, 2021 · 2 comments · Fixed by #29260
Closed

user_status "last statuses" widget leaks account names #27122

doobry-systemli opened this issue May 26, 2021 · 2 comments · Fixed by #29260
Labels
2. developing Work in progress bug security

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@doobry-systemli
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There should be an option to globally disable the "Last statuses" widget. It leaks account names, which might be the desired behaviour, but might as well be not.

On "semi-public" Nextcloud instances you usually don't want to expose other users to each other, which is also why e.g. shareapi_allow_share_dialog_user_enumeration can be disabled.

Currently it's only possible to disable user_status altogether. It would be nice if there was the option to keep user_status enabled but disable the "Last statuses" widget.
@doobry-systemli doobry-systemli added 0. Needs triage Pending check for reproducibility or if it fits our roadmap bug labels May 26, 2021
@mejo-
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mejo- commented Jul 4, 2021

Oh wow, I just stumbled upon this bug and realized that it's possible to get a full list of users using the user_status api. https://cloud.example.org/ocs/v2.php/apps/user_status/api/v1/statuses will return statuses for all users.

I already looked into a fix, but I'm unsure what's the best approach. We probably should check for the shareapi_allow_share_dialog_user_enumeration config setting in statusService->findAll() and statusService->findAllRecentStatusChanges() and return an empty array if it's disabled.

But to be honest, I'm not sure whether it's a good idea to provide an API endpoint that lists all users at once at all, even without shareapi_allow_share_dialog_user_enumeration disabled, no? Also, I couldn't find usage of the Statuses#findAll route (URL /api/v1/statuses), at least not in the Nextcloud server code. So maybe this route should be removed altogether?

So my suggested fix would be twofold:

  • Remove the route Statuses#findAll and statusService->findAll() altogether
  • Make statusService->findAllRecentStatusChanges return an empty array if config option shareapi_allow_share_dialog_user_enumeration is disabled

Let me know what you think and I could prepare a patch.

mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
cf9f932 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
@mejo- mejo- mentioned this issue Jul 8, 2021
Closed
mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
c0a6312 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
c8795e6 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
9ded77f 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
260b3ed 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
Signed-off-by: Jonas Meurer <jonas@freesources.org>
@mejo-
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mejo- commented Jul 8, 2021

I opened a PR to fix this issue: #27879

mejo- added a commit that referenced this issue Jul 8, 2021
@mejo-
Return empty user status list if user enumeration is disabled (Fixes: #…
8b50919 
…27122)

The functions to find statuses from other users listed other users even
if with disabled enumeration (`shareapi_allow_share_dialog_user_enumeration`
setting in core app settings).

Now the functions respect `shareapi_allow_share_dialog_user_enumeration`
and return empty lists if it is not set to `yes`.

Fixes: #27122
Signed-off-by: Jonas Meurer <jonas@freesources.org>
@szaimen szaimen added 2. developing Work in progress and removed 0. Needs triage Pending check for reproducibility or if it fits our roadmap labels Jul 8, 2021
mejo- added a commit that referenced this issue Jul 28, 2021
@mejo-
Respect user enumeration settings in user status lists
393721d 
The functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 28, 2021
@mejo-
Respect user enumeration settings in user status lists
ca826b7 
The functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 28, 2021
@mejo-
Respect user enumeration settings in user status lists
24952d4 
The functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 28, 2021
@mejo-
Respect user enumeration settings in user status lists
6ef3218 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 29, 2021
@mejo-
Respect user enumeration settings in user status lists
55c2716 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 30, 2021
@mejo-
Respect user enumeration settings in user status lists
c964fe0 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 30, 2021
@mejo-
Respect user enumeration settings in user status lists
f048df1 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Jul 30, 2021
@mejo-
Respect user enumeration settings in user status lists
bb3e7e1 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 15, 2021
@mejo-
Respect user enumeration settings in user status lists
80d472d 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 15, 2021
@mejo-
Respect user enumeration settings in user status lists
f5bc265 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 15, 2021
@mejo-
Respect user enumeration settings in user status lists
9d153b9 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
@mejo- mejo- mentioned this issue Oct 15, 2021
Merged
mejo- added a commit that referenced this issue Oct 16, 2021
@mejo-
Respect user enumeration settings in user status lists
ced8e26 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 19, 2021
@mejo-
Respect user enumeration settings in user status lists
7c64e5c 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 20, 2021
@mejo-
Respect user enumeration settings in user status lists
3fe267b 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
mejo- added a commit that referenced this issue Oct 25, 2021
@mejo-
Respect user enumeration settings in user status lists
af00399 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
@mejo- mejo- mentioned this issue Oct 25, 2021
Merged
mejo- added a commit that referenced this issue Oct 25, 2021
@mejo-
Respect user enumeration settings in user status lists
02ce5c8 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
@mejo- mejo- mentioned this issue Oct 25, 2021
Merged
mejo- added a commit that referenced this issue Oct 25, 2021
@mejo-
Respect user enumeration settings in user status lists
50a2574 
So far, the functions to find user statuses listed didn't respect user
enumeration settings (`shareapi_allow_share_dialog_user_enumeration`
and `shareapi_restrict_user_enumeration_to_group` core app settings).

Fix this privacy issue by returning an empty list in case
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

In the long run, we might want to return users from common groups if
`shareapi_restrict_user_enumeration_to_group` is set. It's complicated
to implement this in a way that scales, though. See the discussion at
#27879 (review)
for details.

Also, don't register the user_status dashboard widget at all if
`shareapi_allow_share_dialog_user_enumeration` is unset or
`shareapi_restrict_user_enumeration_to_group` is set.

Fixes: #27122

Signed-off-by: Jonas Meurer <jonas@freesources.org>
@mejo- mejo- mentioned this issue Oct 25, 2021
Merged
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@PVince81 @mejo- @doobry-systemli @szaimen