# CVE-2013-6013: Memory corruption in n/a

> Remote attackers can execute arbitrary code on Juniper SRX devices via a buffer overflow in the flow daemon when telnet pass-through authentication is enabled.

- **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Oct 2013
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-mcf9-3hx5-x5wc

## What is CVE-2013-6013?

CVE-2013-6013 is a medium-severity memory corruption vulnerability in Juniper Junos, published on 17 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in the flow daemon (flowd) in Juniper Junos 10.4 before 10.4S14, 11.4 before 11.4R7-S2, 12.1.X44 before 12.1X44-D15, 12.1X45 before 12.1X45-D10 on SRX devices, when using telnet pass-through authentication on the firewall, might allow remote attackers to execute arbitrary code via a crafted telnet message.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2013-6013?

It affects 1 product.


Products: Juniper Junos.

## How do I fix CVE-2013-6013?

No fix has been published for CVE-2013-6013 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-6013 being exploited?

There is no known exploitation of CVE-2013-6013 in the wild and no public exploit code.

## Other vulnerabilities in Juniper Junos

- [CVE-2023-36845](https://insights.sbomify.com/CVE-2023-36845/): Juniper Junos OS EX Series and SRX Series PHP External Variable Modification (critical 9.8, exploited in the wild)
- [CVE-2020-1631](https://insights.sbomify.com/CVE-2020-1631/): Juniper Junos OS Path Traversal (high 8.8, exploited in the wild)
- [CVE-2025-21590](https://insights.sbomify.com/CVE-2025-21590/): Juniper Junos OS Improper Isolation or Compartmentalization (medium 6.7, exploited in the wild)
- [CVE-2023-36851](https://insights.sbomify.com/CVE-2023-36851/): Juniper Junos OS SRX Series Missing Authentication for Critical Function (medium 5.3, exploited in the wild)
- [CVE-2023-36844](https://insights.sbomify.com/CVE-2023-36844/): Juniper Junos OS EX Series PHP External Variable Modification (medium 5.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-6013 and fix it if it is affected.

What it is: CVE-2013-6013 is a medium-severity memory corruption vulnerability in Juniper Junos, published on 17 Oct 2013. 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-2013-6013 in the wild and no public exploit code.

Affected product: Juniper Junos. 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-2013-6013/ (Markdown: https://insights.sbomify.com/CVE-2013-6013/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-6013
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-6013
- OSV: https://osv.dev/vulnerability/CVE-2013-6013

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From sbomify Insights: https://insights.sbomify.com/CVE-2013-6013/
Summaries are generated and may contain mistakes; the official description above is the record.