Github json-smart-v1 缓冲区错误漏洞

Github json-smart-v1 is a Github open source application . Provides all non-indexed data in the data store as serialized JSON messages stored in the columns function . A security vulnerability exists in JSON Smart versions 1.3 and 2.4, which originates in the indexOf function of JSONParserByteArr...

PT-2021-19835 · Nextcloud +1 · Nextcloud Server +1

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 10.0.11 Nextcloud Server versions prior to 20.0.10 Nextcloud Server versions prior to 21.0.2 Description: A malicious user may be able to break the user administration page, disallowing administrators to...

Alias creation did not validate account ID

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Nextcloud: Leaking sensitive information through JSON file path.

Hello team, I have found one JSON path at "https://lookup.nextcloud.com/" which is leaking some information like Username, email id, version, etc.. I guess it show the user who have installed or configure anything through the vendor. I was also able to download some of the zip files of the vendor...

Nextcloud: Serverinfo endpoints are not bruteforce protected nor are tokens properly generated

The serverinfo app allows accessing the endpoints also via a custom token. https://github.com/nextcloud/serverinfo/blob/9ae9dde028a684e53a1b37c9ba8e964ffe42a97f/lib/Controller/ApiController.phpL121 The token is set/generated via...

Nextcloud: Federated editing allows iframing possibly malicious remotes

So this attack is less likely now that you killed the trusted server auto adding. But as far as I could tell you did not clear out old servers. Let me first describe the attack: 1. UserA on ServerA sends a federated share to userB on serverB 2. Assume serverA and serverB are trusted servers 3. No...

Nextcloud Desktop Client: User-assisted execution of arbitrary code

Background The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. Description It was discovered that Nextcloud Desktop Client did not validate URLs. Impact A remote attacker could entice a user to connect to a malicious Nextcloud server to cause the...

Nextcloud: Webauthn tokens are not removed on user deletion

userA has an account on serverA 2. userA enables passwordless login webauthn and registers a key/device 3. userA is removed from the system 4. a new user comes along and gets assigned userA as id 5. the old userA tries to login with their key 6. the old userA can see all data of the new userA...

Nextcloud: No admin audit log for auth tokens

There seems to be no audit trail for auth tokens. Creating tokens Revoking tokens Scope changes Renames Marking the token to be wiped Impact As auth tokens are used to access your data having a track record when they are created helps a lot. If you also take https://hackerone.com/reports/1193321...

Nextcloud: No admin audit entry for enabling/disabling 2FA

Related to https://hackerone.com/reports/1177353 When a user enables or disables 2FA there is no entry in the audit log. Impact Especially for disabling it should probably be logged there. But account security related things should be in there...

Nextcloud: Federated share accepting/declining is not logged in audit log

In relation to https://hackerone.com/reports/1177353 1. Enable the audit log 2. Share a file to a federated user 3. So far all looks good in the log 4. the recipient checks either accepts or declines the share 5. There is no line regarding this in the logs. Impact The audit log is used to get a...

Nextcloud: Admin audit is not properly logging unsetting of expiration date

In relation to https://hackerone.com/reports/1177353 1. Enable the audit log 2. Share a file 3. Set and expiration date So far all looks good in the log 4. Unset the the expiration date. 5. See a pretty useless log line Impact The audit log is used to get a full trail of the actions which is now...

Nextcloud: Ransomware protection is missing extentions take 2

As requested in https://hackerone.com/reports/1195568 Impact So not spam ;...

openSUSE Security Update : nextcloud-desktop (openSUSE-2021-577)

This update for nextcloud-desktop fixes the following issues : nextcloud-desktop was updated to 3.1.3 : - desktop2884 stable-3.1 Add support for Hirsute - desktop2920 stable-3.1 Validate sensitive URLs to onle allow https schemes. - desktop2926 stable-3.1 Validate the providers ssl certificate -...

Nextcloud: Talk discloses turn server to anybody

The attack is straight forward. 1. send a request to bash curl -H 'OCS-APIREQUEST: true' https://server/ocs/v2.php/apps/spreed/api/v2/signaling/settings And you get back a lot of information. signaling server stun server turn server inc credentials The stun server is harmless enough. I did not lo...

Nextcloud: Ransomware protection is missing extentions

So again I'm not sure if this is in scope. However you do advertise this on your enterprise pages. So I assume so. In any case. It seems your ransomewareprotection app is missing some common extentions. See for example...

Nextcloud: Virtual Data Room / Hide download on collabora is easy to bypass

So, let me start with saying I'm not sure if this is a security issue or if it is by design. The reason I'm reporting it here is since Nextcloud promotes this Virtual Data Room a lot...

Nextcloud: Scoped apptokens can be changed by that very apptoken

I noticed that there is the possibility to limit apptokens to not be able to access the filesystem. 1. Create a new apptoken in https://server/settings/user/security 2. Click the .. of your new apptoken and make it not allowed to access the filesystem 3. Log out 4. Navigate to...

Nextcloud: Clients do not verify server public key

So this is related to https://hackerone.com/reports/1189162 but also to your RFC Bear with me because there is going to be some hand waving here and there. Since not everything is implemented yet from your RFC. Right now what happens is:...

Nextcloud: public webdav endpoint not bruteforce protected

Again related to https://hackerone.com/reports/1173684 I am having some trouble finding the code. However if you do curl -u "RANDOM1:RANDOM2" -X PROPFIND https://server/public.php/webdav And then check your ocbruteforceattempts table. You'll see there is no entry registered. Impact Low just like ...