CVE-2022-30781 – CVE-2022-30781 is a remote code execution vulne... (How to Fix)

Q: What is the severity of CVE-2022-30781?

CVE-2022-30781 has a CVSS score of 7.5 (HIGH). CVE-2022-30781 is a remote code execution vulnerability in Gitea where improper escaping of git fetch remote parameters allows attackers to execute arbitrary commands on the server. This affects all Gitea instances before version 1.16.7. Attackers can exploit this to gain control of the Gitea server.

📋 TL;DR

CVE-2022-30781 is a remote code execution vulnerability in Gitea where improper escaping of git fetch remote parameters allows attackers to execute arbitrary commands on the server. This affects all Gitea instances before version 1.16.7. Attackers can exploit this to gain control of the Gitea server.

💻 Affected Systems

Products:

Gitea

Versions: All versions before 1.16.7

Operating Systems: All platforms running Gitea

Default Config Vulnerable: ⚠️ Yes

Notes: All Gitea installations with git fetch functionality enabled are vulnerable. No special configuration required.

📦 What is this software?

Gitea by Gitea

View all CVEs affecting Gitea →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete server compromise with attacker gaining root/system privileges, data theft, lateral movement, and persistent backdoor installation.

🟠

Likely Case

Unauthorized code execution with Gitea service account privileges, allowing repository manipulation, credential theft, and further system exploitation.

🟢

If Mitigated

Limited impact with proper network segmentation and least privilege controls, potentially containing damage to the Gitea application only.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: CONFIRMED

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires authenticated access to Gitea. Multiple public exploit scripts exist.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.16.7 and later

Vendor Advisory: https://blog.gitea.io/2022/05/gitea-1.16.7-is-released/

Restart Required: Yes

Instructions:

1. Backup your Gitea data and configuration. 2. Stop Gitea service. 3. Download and install Gitea 1.16.7 or later from https://dl.gitea.io/gitea/. 4. Restart Gitea service. 5. Verify version with 'gitea --version'.

🔧 Temporary Workarounds

Disable git fetch remote functionality

all

Temporarily disable git fetch operations via remote repositories

Modify Gitea configuration to restrict git operations
Set [repository] ENABLE_PUSH_CREATE_USER = false in app.ini

🧯 If You Can't Patch

Implement strict network segmentation to isolate Gitea server from critical systems
Apply strict access controls and monitor for suspicious git fetch operations

🔍 How to Verify

Check if Vulnerable:

Check Gitea version with 'gitea --version'. If version is below 1.16.7, system is vulnerable.

Check Version:

gitea --version

Verify Fix Applied:

Verify version is 1.16.7 or higher with 'gitea --version'. Test git fetch functionality with controlled test cases.

📡 Detection & Monitoring

Log Indicators:

Unusual git fetch operations with suspicious remote URLs
Commands executed via git hooks
Failed authentication attempts followed by git operations

Network Indicators:

Unusual outbound connections from Gitea server
Git protocol traffic to unexpected destinations

SIEM Query:

source="gitea.log" AND ("git fetch" OR "remote.*") AND (suspicious OR error OR failed)

📊 Metadata

CVE ID: CVE-2022-30781

CVSS v3 Score: 7.5 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CWE: CWE-116

Published: May 16, 2022

Last Updated: November 21, 2024

🔗 References

http://packetstormsecurity.com/files/168400/Gitea-1.16.6-Remote-Code-Execution.html Exploit,Third Party Advisory,VDB Entry
http://packetstormsecurity.com/files/169928/Gitea-Git-Fetch-Remote-Code-Execution.html Exploit,Third Party Advisory,VDB Entry
https://blog.gitea.io/2022/05/gitea-1.16.7-is-released/ Release Notes,Vendor Advisory
https://github.com/go-gitea/gitea/pull/19487 Patch,Third Party Advisory
https://github.com/go-gitea/gitea/pull/19490 Patch,Third Party Advisory
http://packetstormsecurity.com/files/168400/Gitea-1.16.6-Remote-Code-Execution.html Exploit,Third Party Advisory,VDB Entry
http://packetstormsecurity.com/files/169928/Gitea-Git-Fetch-Remote-Code-Execution.html Exploit,Third Party Advisory,VDB Entry
https://blog.gitea.io/2022/05/gitea-1.16.7-is-released/ Release Notes,Vendor Advisory
https://github.com/go-gitea/gitea/pull/19487 Patch,Third Party Advisory
https://github.com/go-gitea/gitea/pull/19490 Patch,Third Party Advisory

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