# CVE-2024-2056: Artica Proxy Loopback Services Remotely Accessible Unauthenticated

> Unauthenticated attackers can access loopback services to view any file on the Artica Proxy server, leading to sensitive data exposure.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Mar 2024
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-8jfc-89mc-pjwm, GO-2024-2612

## What is CVE-2024-2056?

CVE-2024-2056 is a critical vulnerability in Artica Proxy, published on 5 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Services that are running and bound to the loopback interface on the Artica Proxy are accessible through the proxy service. In particular, the "tailon" service is running, running as the root user, is bound to the loopback interface, and is listening on TCP port 7050. Security issues associated with exposing this network service are documented at gvalkov's 'tailon' GitHub repo. Using the tailon service, the contents of any file on the Artica Proxy can be viewed.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2024-2056?

1 open source package ship an affected version, including github.com/gvalkov/tailon. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/gvalkov/tailon` | Go | All versions | None |

Products: Articatech Artica Proxy.

## How do I fix CVE-2024-2056?

No fix has been published for CVE-2024-2056 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-2056 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-2056 exists.

## Other vulnerabilities in Artica Proxy

- [CVE-2024-2054](https://insights.sbomify.com/CVE-2024-2054/): Artica Proxy Unauthenticated PHP Deserialization Vulnerability (critical 9.8)
- [CVE-2024-2055](https://insights.sbomify.com/CVE-2024-2055/): Artica Proxy Unauthenticated File Manager Vulnerability (critical 9.8)
- [CVE-2021-41739](https://insights.sbomify.com/CVE-2021-41739/): Command injection in n/a (critical 9.8)
- [CVE-2020-13159](https://insights.sbomify.com/CVE-2020-13159/): Artica Proxy before 4.30.000000 Community Edition allows OS command injection via the Netbios name, Server domain name, dhclient_mac, Hostname, or Alias field. (critical 9.8)
- [CVE-2017-17055](https://insights.sbomify.com/CVE-2017-17055/): Cross-site scripting in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-2056 and fix it if it is affected.

What it is: CVE-2024-2056 is a critical vulnerability in Artica Proxy, published on 5 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-2056 exists.

Affected packages and fixed versions:
- github.com/gvalkov/tailon (Go): affected all versions; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-2056/ (Markdown: https://insights.sbomify.com/CVE-2024-2056/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2056
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2056
- OSV: https://osv.dev/vulnerability/CVE-2024-2056

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-2056/
Summaries are generated and may contain mistakes; the official description above is the record.