# CVE-2012-3863: Denial of service in n/a

> Remote authenticated users can cause a denial of service via RTP port exhaustion by sending SIP reINVITE requests without final responses.

- **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:** 9 Jul 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-3863, GHSA-6fc4-87xv-rxjx

## What is CVE-2012-3863?

CVE-2012-3863 is a medium-severity denial of service vulnerability in Digium Asterisk, published on 9 Jul 2012. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Asterisk Business Edition C.3.x before C.3.7.5, Certified Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones 10.x.x-digiumphones before 10.5.2-digiumphones does not properly handle a provisional response to a SIP reINVITE request, which allows remote authenticated users to cause a denial of service (RTP port exhaustion) via sessions that lack final responses.

Weakness: CWE-399

## Which versions are affected by CVE-2012-3863?

It affects 4 products.


Products: Digium Asterisk, Digium Asterisk Business Edition, Digium Asteriske, Digium Certified Asterisk.

## How do I fix CVE-2012-3863?

Upgrade to a fixed version.

## Is CVE-2012-3863 being exploited?

There is no known exploitation of CVE-2012-3863 in the wild and no public exploit code.

## Other vulnerabilities in Digium Asterisk

- [CVE-2017-14100](https://insights.sbomify.com/CVE-2017-14100/): Command injection in n/a (critical 9.8)
- [CVE-2014-8418](https://insights.sbomify.com/CVE-2014-8418/): Privilege escalation in n/a (critical 9.0)
- [CVE-2011-1599](https://insights.sbomify.com/CVE-2011-1599/): Missing authorization in n/a (critical 9.0)
- [CVE-2017-16671](https://insights.sbomify.com/CVE-2017-16671/): Memory corruption in n/a (high 8.8)
- [CVE-2017-7617](https://insights.sbomify.com/CVE-2017-7617/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-3863 and fix it if it is affected.

What it is: CVE-2012-3863 is a medium-severity denial of service vulnerability in Digium Asterisk, published on 9 Jul 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-2012-3863 in the wild and no public exploit code.

Affected product: Digium Asterisk. 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-2012-3863/ (Markdown: https://insights.sbomify.com/CVE-2012-3863/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-3863
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-3863
- OSV: https://osv.dev/vulnerability/CVE-2012-3863

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-3863/
Summaries are generated and may contain mistakes; the official description above is the record.