LDAP injection in Mastodon - CVE-2023-28853
Published: May 4, 2023
Vulnerability identifier: #VU75710
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N]
CVE-ID: CVE-2023-28853
CWE-ID: CWE-90
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to improper input validation when processing DLAP queries. A remoteuser can send a specially crafted LDAP query to the application, bypass authentication process and gain unauthorized access to sensitive information.
Affected software
Mastodon
How to mitigate CVE-2023-28853
Install updates from vendor's website.
Mastodon - addressed in versions 3.5.8, 4.0.4, 4.1.2
External References
- https://github.com/mastodon/mastodon/security/advisories/GHSA-38g9-pfm9-gfqv
- https://github.com/mastodon/mastodon/pull/24379
- https://github.com/mastodon/mastodon/releases/tag/v3.5.8
- https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/app/models/concerns/ldap_authenticable.rb#L7-L14
- https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/config/initializers/devise.rb#L398-L414
- https://github.com/mastodon/mastodon/releases/tag/v4.1.2
- https://github.com/mastodon/mastodon/releases/tag/v4.0.4