When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Gitea Gitea
cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*
|
— |
28.0.0
|
References 4
https://github.com/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9m
GitHub Security Advisory GHSA-fqjr-23c8-gg9m
https://github.com/go-gitea/gitea/pull/39426
Fix: go-gitea/gitea pull request #39426
https://blog.gitea.com/release-of-28.0.0/
Gitea 28.0.0 release announcement
https://github.com/go-gitea/gitea/releases/tag/v28.0.0
go-gitea/gitea v28.0.0 release