# CVE-2013-1841: Auth bypass in n/a

> Remote attackers can bypass ACL restrictions in Net-Server when reverse-lookups are enabled by spoofing hostnames, requiring a patch to fix.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Jun 2014
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2013-1841, GHSA-7whr-c582-hxj6, MGASA-2023-0120, SUSE-SU-2023:0746-1, SUSE-SU-2023:0759-1, UBUNTU-CVE-2013-1841

## What is CVE-2013-1841?

CVE-2013-1841 is a medium-severity authentication bypass vulnerability in n/a, published on 13 Jun 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Net-Server, when the reverse-lookups option is enabled, does not check if the hostname resolves to the source IP address, which might allow remote attackers to bypass ACL restrictions via the hostname parameter.

Weakness: CWE-264

## Which versions are affected by CVE-2013-1841?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `perl-Net-Server` | SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 2.009-150000.3.3.1 |
| `perl-Net-Server` | SUSE:Linux Enterprise Real Time 15 SP3 | All versions | 2.009-150000.3.3.1 |
| `perl-Net-Server` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.007-5.3.1 |
| `perl-Net-Server` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.007-5.3.1 |
| `perl-Net-Server` | openSUSE:Leap 15.4 | All versions | 2.009-150000.3.3.1 |

Products: Seamons Net-Server.

## How do I fix CVE-2013-1841?

Apply the vendor's patch.

## Is CVE-2013-1841 being exploited?

There is no known exploitation of CVE-2013-1841 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-1841 and fix it if it is affected.

What it is: CVE-2013-1841 is a medium-severity authentication bypass vulnerability in n/a, published on 13 Jun 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2013-1841 in the wild and no public exploit code.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2013-1841/ (Markdown: https://insights.sbomify.com/CVE-2013-1841/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-1841
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-1841
- OSV: https://osv.dev/vulnerability/CVE-2013-1841

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-1841/
Summaries are generated and may contain mistakes; the official description above is the record.