# CVE-2012-2948: Null dereference in n/a

> Remote authenticated users can crash the Asterisk PBX daemon by closing a Skinny connection in off-hook mode, causing a denial of service.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 2 Jun 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-2948, GHSA-chr5-w9ff-5gcw

## What is CVE-2012-2948?

CVE-2012-2948 is a medium-severity vulnerability in n/a, published on 2 Jun 2012. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

chan_skinny.c in the Skinny (aka SCCP) channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by closing a connection in off-hook mode.

Weakness: CWE-399

## Which versions are affected by CVE-2012-2948?

It affects 3 products.


Products: Asterisk Certified Asterisk, Asterisk Open Source, Sangoma Asterisk.

## How do I fix CVE-2012-2948?

Upgrade to a fixed version.

## Is CVE-2012-2948 being exploited?

There is no known exploitation of CVE-2012-2948 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-21723](https://insights.sbomify.com/CVE-2022-21723/): Out-of-bounds read in multipart parsing in PJSIP (critical 9.1)
- [CVE-2022-23608](https://insights.sbomify.com/CVE-2022-23608/): Use after free in PJSIP (high 8.1)
- [CVE-2017-9358](https://insights.sbomify.com/CVE-2017-9358/): Denial of service in n/a (high 7.5)
- [CVE-2021-37706](https://insights.sbomify.com/CVE-2021-37706/): Potential integer underflow upon receiving STUN message in PJSIP (high 7.3)
- [CVE-2021-46837](https://insights.sbomify.com/CVE-2021-46837/): Null dereference in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-2948 and fix it if it is affected.

What it is: CVE-2012-2948 is a medium-severity vulnerability in n/a, published on 2 Jun 2012. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2012-2948 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-2012-2948/ (Markdown: https://insights.sbomify.com/CVE-2012-2948/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-2948
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-2948
- OSV: https://osv.dev/vulnerability/CVE-2012-2948

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-2948/
Summaries are generated and may contain mistakes; the official description above is the record.