GHSA-q9p8-33wc-h432 BIT-harbor-2020-13794 CVE-2020-13794 GO-2022-0865
Authenticated users can exploit an enumeration vulnerability in Harbor
- Severity
- 4.3 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 1.27%
- Chance of exploitation in the next 30 days. Higher than 69.75% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-862 Missing Authorization
- Fix
2.0.3- Upgrade github.com/goharbor/harbor to this version or later
Description
Impact
Hidde Smit from Cyber Eagle has discovered an User Enumeration flaw in Harbor. The issue is present in the "/users" api endpoint. This endpoint is supposed to be restricted to administrators. This restriction is able to be bypassed and information can be obtained via the "search" functionality.
Non-administrator users (such as those created via self-registration) can list all usernames and user IDs by sending a GET request to /api/users/search with parameter "username" and value "_", as follows:
curl -X GET "https://<host>/api/users/search?username=_" -H "accept: application/json" --user <user>:<password>
The vulnerability was immediately fixed by the Harbor team and all supported versions were patched. With the patched versions of Harbor, the username is required for search and we have removed the support for querying by email.
Patches
If your product uses the affected releases of Harbor, update to either version 2.1.0 or 2.0.3 to fix this issue immediately
https://github.com/goharbor/harbor/releases/tag/v2.1.0 https://github.com/goharbor/harbor/releases/tag/v2.0.3
Workarounds
There is no workaround for this issue
For more information
If you have any questions or comments about this advisory, contact cncf-harbor-security@lists.cncf.io View our security policy at https://github.com/goharbor/harbor/security/policy https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13794
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/goharbor/harbor | < 2.0.3 |
2.0.3 |
| github.com/goharbor/harbor | < 2.0.3+incompatible |
2.0.3+incompatible |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
github.com/goharbor/harbor Go → 2.0.3
- go
go get github.com/goharbor/harbor@v2.0.3 && go mod tidy
Severity breakdown
CVSS 3.1 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Weakness
CWE-862: Missing Authorization
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
How to prevent it
- Architecture and Design: Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Architecture and Design: Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor [REF-7].
- Architecture and Design: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
- Architecture and Design: For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page. One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
- System Configuration, Installation: Use the access control capabilities of your operating system and server environment and define your access control lists accordingly. Use a "default deny" policy when defining these ACLs.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-prh4-vhfh-24mj Harbor: LDAP password and OIDC secret are not redacted in the audit log | Medium | Also affects github.com/goharbor/harbor |
| GHSA-hj7x-hmf2-hc2p Harbor allows the use of the default password for web UI login | Critical | Also affects github.com/goharbor/harbor |
| GHSA-h27m-3qw8-3pw8 Possible ORM Leak Vulnerability in the Harbor | Medium | Also affects github.com/goharbor/harbor |
| GHSA-f9vc-vf3r-pqqq Harbor repository description page has Cross-site Scripting vulnerability | Medium | Also affects github.com/goharbor/harbor |
| GHSA-r864-28pw-8682 Harbor fails to validate the user permissions when updating p2p preheat policies | High | Also affects github.com/goharbor/harbor |
| GHSA-hw28-333w-qxp3 Harbor fails to validate the user permissions when updating project configurations | Medium | Also affects github.com/goharbor/harbor |
| GHSA-vw63-824v-qf2j SQL Injection in Harbor scan log API | Medium | Also affects github.com/goharbor/harbor |
| GHSA-5757-v49g-f6r7 Open Redirect URL in Harbor | Medium | Also affects github.com/goharbor/harbor |
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