Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in Homarr, an open-source dashboard used for organizing services. If Homarr is configured to use LDAP for authentication and an attacker gains access to a user account, they could potentially escalate their privileges and access other users' groups. The main concern is confirming if your environment uses Homarr with LDAP authentication and if any user accounts have been compromised.
- User input errors allow unauthorized access.
- It impacts user data and system control.
- Confirm Homarr LDAP use and exposure.
Attack Path
How an attacker could exploit the issue
An attacker with a user account could leverage a flaw in how Homarr handles LDAP search queries. By submitting specially crafted input, an attacker might gain elevated privileges and access other users' data. This could happen in any Homarr instance that uses LDAP for authentication and is exposed to a malicious actor who has already compromised a user account.
- Requires authenticated user account.
- Triggered by crafted LDAP search input.
- Leads to privilege escalation and data access.
Live Threat
Current exploitation, exposure, and threat context
When supported by the advisory, Homarr instances using LDAP authentication could be vulnerable to privilege escalation if a malicious actor gains access to a user account. This occurs due to improperly sanitized inputs in the LDAP search query, potentially affecting access to other users' group information.
- User group data could be at risk.
- Malicious actor leverages a user account.
- Unauthorized access to other user groups.
Operational Fix
Recommended remediation, mitigation, and detection steps
In real-world scenarios, application owners and platform teams are typically responsible for Homarr, especially when it's used for managing other services and incorporates LDAP authentication. The first practical step involves identifying all Homarr instances, confirming their network exposure and business criticality, and then locating the accountable owner to plan a risk-based remediation strategy.
- Application owners should manage this issue.
- Verify LDAP authentication and reachability first.
- Coordinate vendor updates and plan remediation.
