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"catalog's registry v2 api exposed on unauthenticated path in Harbor"

Moderate severity GitHub Reviewed Published Dec 17, 2020 in goharbor/harbor • Updated Jan 9, 2023

Package

gomod github.com/goharbor/harbor (Go)

Affected versions

< 2.0.5
>= 2.1.0, < 2.1.2

Patched versions

2.0.5
2.1.2

Description

Impact

Javier Provecho, member of the TCCT (Telefonica Cloud & Cybersecurity Tech better known as ElevenPaths) SRE team discovered a vulnerability regarding Harbor’s v2 API.

The catalog’s registry v2 api is exposed on an unauthenticated path. The current catalog API path is served at the following path and it requires to be authenticated as an admin.

"GET /v2/_catalog"

However, the authorization can be bypassed by using the following path

"GET /v2/_catalog/"

Patches

If your product uses the affected releases of Harbor, update to either version v2.1.2 or v2.0.5 to fix this issue immediately

https://github.com/goharbor/harbor/releases/tag/v2.1.2
https://github.com/goharbor/harbor/releases/tag/v2.0.5

Workarounds

If you cannot access a patched release, it can be mitigated by disabling that API. For example, redirecting it to a 404 sink hole in the ingress.

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-2020-29662

References

@xaleeks xaleeks published to goharbor/harbor Dec 17, 2020
Reviewed May 21, 2021
Published to the GitHub Advisory Database Feb 12, 2022
Last updated Jan 9, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.066%
(31st percentile)

Weaknesses

CVE ID

CVE-2020-29662

GHSA ID

GHSA-38r5-34mr-mvm7

Source code

No known source code
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