# CVE-2013-1241: Denial of service in n/a

> Remote authenticated users can cause a denial of service on Cisco IOS ISR G2 routers by sending malformed authentication-header packets.

- **Severity:** Medium 6.3 (`AV:N/AC:M/Au:S/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 May 2013
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-57m6-vp8v-97x6

## What is CVE-2013-1241?

CVE-2013-1241 is a medium-severity denial of service vulnerability in Cisco Ios, published on 8 May 2013. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The ISM module in Cisco IOS on ISR G2 routers does not properly handle authentication-header packets, which allows remote authenticated users to cause a denial of service (module reload) via a series of malformed packets, aka Bug ID CSCub92025.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2013-1241?

It affects 27 products.


Products: Cisco 1921 Integrated Services Router, Cisco 1941 Integrated Services Router, Cisco 1941w Integrated Services Router, Cisco 2901 Integrated Services Router, Cisco 2911 Integrated Services Router, Cisco 2921 Integrated Services Router, Cisco 2951 Integrated Services Router, Cisco 3925 Integrated Services Router, Cisco 3925e Integrated Services Router, Cisco 3945 Integrated Services Router, Cisco 3945e Integrated Services Router, Cisco 861 Integrated Services Router, Cisco 867 Integrated Services Router, Cisco 880 3g Integrated Services Router, Cisco 881 Integrated Services Router, Cisco 886 Integrated Services Router, Cisco 886va-W Integrated Services Router, Cisco 886va Integrated Services Router, Cisco 887 Integrated Services Router, Cisco 887v Integrated Services Router and 7 more.

## How do I fix CVE-2013-1241?

No fix has been published for CVE-2013-1241 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-1241 being exploited?

There is no known exploitation of CVE-2013-1241 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-1241 and fix it if it is affected.

What it is: CVE-2013-1241 is a medium-severity denial of service vulnerability in Cisco Ios, published on 8 May 2013. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2013-1241 in the wild and no public exploit code.

Affected product: Cisco Ios. 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-2013-1241/ (Markdown: https://insights.sbomify.com/CVE-2013-1241/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-1241
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-1241
- OSV: https://osv.dev/vulnerability/CVE-2013-1241

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-1241/
Summaries are generated and may contain mistakes; the official description above is the record.