Graylog vulnerabilities

Graylog is a free and open log management platform. From 6.3.0 until 6.3.14, 7.0.9, and 7.1.4, the view update API for saved searches and dashboards permits a user with edit permission but without entity ownership to include a shareRequest that grants owner permissions to an arbitrary account. The selected account can then delete the saved search or dashboard or remove the original owner's access. Graylog Cloud was patched before the advisory was published. This issue is fixed in versions 6.3.14, 7.0.9, and 7.1.4.

Graylog through 7.1.4 validates outbound URLs against an allowlist before making requests but fails to re-validate after following HTTP redirects. Attackers with lookup table or event notification permissions can craft allowlisted endpoints that redirect to internal services, enabling the server to fetch and return internal responses.

Graylog from 6.2.0 to 6.3.12, 7.0.7, and 7.1.2 has a vulnerability in the DELETE /users/{userId}/tokens/{idOrToken} endpoint where USERS_TOKENREMOVE permission is checked against the attacker-controlled userId path parameter before resolving the token selected by idOrToken. An authenticated user can provide an authorized userId while loadById() or load() resolves a token belonging to another user, including a service account or administrator, after which destroy() deletes that token without checking AccessToken.getUserName(). The issue does not expose token contents, but unauthorized deletion causes integrity impact and can disrupt access-token-based integrations.

Vulnerability in Graylog Server before versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder before 7.3. The FortiGate syslog parser mishandles fields inside quoted values, allowing an unauthenticated sender to manipulate security-log fields or evade logging to obscure malicious activity.

Graylog from 7.1.0 until 7.1.4 and 7.2.0-alpha.2 allows an authenticated user to request composite display fields in the System Catalog entity titles endpoint without verifying that every selected field is readable. A user can retrieve protected values, including password hashes on readable user records; ordinary users are limited to their own records, while administrators can retrieve hashes for all users.

Graylog, a log management platform, uses a single source port for DNS queries, which goes against recommended security practices. This could allow DNS cache poisoning attacks, where an external attacker can inject forged DNS responses into Graylog's cache.

Graylog has a partial path traversal vulnerability in the `Support Bundle` feature that allows an attacker with valid Admin role credentials to download or delete files in sibling directories. The issue is caused by improper input validation in an HTTP API resource.

In the Graylog platform, in multi-node clusters, a user session may still be used for API requests after logout until it reaches its original expiry time. Each node maintains a local cache of user sessions, leading to situations where other nodes may still accept the session after it has been removed from the local cache.