Nextcloud 安全漏洞

Nextcloud is a set of open source self-hosted file synchronization and sharing communication application platform from Nextcloud, Germany. A security vulnerability exists in Nextcloud Server that stems from a public link that can be added as a federated file share. An attacker could use this...

HPE Fixes Critical Zero-Day in SIM

Hewlett Packard Enterprise HPE has fixed a critical zero-day remote code execution RCE flaw in its HPE Systems Insight Manager SIM software for Windows that it originally disclosed in December. HPE SIM is a tool that enables remote support automation and management for a variety of HPE servers,...

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...

Security Bulletin: A Security Vulnerability Has Been Identified In IBM® SDK, Java™ Technology Edition shipped with IBM Tivoli Federated Identity Manager (CVE-2021-2161)

Summary IBM® SDK, Java™ Technology Edition is shipped with IBM Tivoli Federated Identity Manager. Information about a security vulnerability affecting IBM® SDK, Java™ Technology Edition has been published in a security bulletin. Vulnerability Details Refer to the security bulletins listed in the...

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...

Security Bulletin: Security Vulnerabilities Have Been Identified In IBM WebSphere Application Server shipped with IBM Tivoli Federated Identity Manager (CVE-2015-5262, CVE-2014-3577, CVE-2012-6153, CVE-2011-1498)

Summary IBM WebSphere Application Server is shipped with IBM Tivoli Federated Identity Manager. Information about security vulnerabilities affecting IBM WebSphere Application Server has been published in a security bulletin. Vulnerability Details Refer to the security bulletins listed in the...

CVE-2021-29471 Denial of service in Matrix Synapse

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.33.2 "Push rules" can specify conditions under which they will match, including eventmatch, which matches event...

Security Bulletin: Security vulnerabilities have been identified in IBM WebSphere Application Server shipped with IBM Tivoli Federated Identity Manager

Summary IBM WebSphere Application Server is shipped with IBM Tivoli Federated Identity Manager. Information about security vulnerabilities affecting IBM WebSphere Application Server have been published in a security bulletin. Vulnerability Details Refer to the security bulletins listed in the...

DRUPAL-CONTRIB-2021-006

The SAML Authentication module allows users to authenticate against a SAML identity provider to login to your Drupal site. The module doesn't sufficiently protect against unauthorized local access, by way of using the 'password reset' facility, for users who are supposed to only be able to log in...

Nextcloud: Default settings leak federated cloud id to lookup server of all users

So with the default settings Nextcloud still sends requests to the lookup server if users update their profile. Even if none of the fields are set to 'published'. I must admit this is somewhat of a surprise as there is no reason for this. As long as the visibility of none of the fields change and...

USN-4925-1: Shibboleth vulnerability

Toni Huttunen and Fraktal Oy discovered that the Shibboleth Service provider allowed content injection due to allowing attacker-controlled parameters in error or other status pages. An attacker could use this to inject malicious content...

Nextcloud: File drop public link can also be converted to federated share

So bear with me. Because this one requires some user interaction and makes some assumptions. 1. victim creates a files drop public link 2. attacker has that link 3. the 'add to your nextcloud is hidden' but if you manually craft the request and send it a federated share will still be created. for...

Nextcloud: Trusted servers exchange can be triggered by attacker

Hi again, So this seems to be less bad these days as the trusted servers are no longer enabled by default however they were some versions ago. The trusted servers exchanged the full user list with another server. As soon as 1 federated share is created between two instances. It is questionable if...

Nextcloud: Federated shares are not password protected

Hi again, So more from me. Bare with me because this is a highly theoretical issue. But I never the less thing it should be mitigated. Or at least disclosed. Premissie: 1. user1 on serverA has a federated share established with user2 on serverB 2. the database not the full system of serverB is...

Nextcloud: Unexpected federated shares added via public link

So I'm not 100% sure if this is an security issue or not. But it is in my opinion at least unexpected and could be handled better to make sure people trust the system. 1. Get a public link share again plenty of those around 2. Click the 'add to your Nextcloud' 3. A federated share is added/create...

PYSEC-2021-25

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392 Open redirect via transitional IPv6 addresses on dual-stack networks

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6...

CVE-2021-21392

Synapse (matrix-synapse) prior to version 1.28.0 is affected by a vulnerability where requests to user-provided domains could escape external IP restrictions on dual-stack networks due to transitional IPv6 addresses. This may allow outbound requests to internal infrastructure during federation, i...

CVE-2021-21394 Denial of service (via resource exhaustion) due to improper input validation on third-party identifier endpoints

Synapse is a Matrix reference homeserver written in python pypi package matrix-synapse. Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party...