# CVE-2016-2316: Denial of service in n/a

> Remote attackers can cause denial of service via file descriptor consumption in Asterisk when specific SIP timeout configurations are set.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Feb 2016
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-2316, GHSA-vjwh-4xjh-5595, MGASA-2016-0086, UBUNTU-CVE-2016-2316

## What is CVE-2016-2316?

CVE-2016-2316 is a medium-severity denial of service vulnerability in Digium Asterisk, published on 22 Feb 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

chan_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3, when the timert1 sip.conf configuration is set to a value greater than 1245, allows remote attackers to cause a denial of service (file descriptor consumption) via vectors related to large retransmit timeout values.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2016-2316?

It affects 3 products.


Products: Digium Asterisk, Digium Certified Asterisk, Fedoraproject Fedora.

## How do I fix CVE-2016-2316?

Upgrade to a fixed version.

## Is CVE-2016-2316 being exploited?

There is no known exploitation of CVE-2016-2316 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-2016-2316 and fix it if it is affected.

What it is: CVE-2016-2316 is a medium-severity denial of service vulnerability in Digium Asterisk, published on 22 Feb 2016. 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-2016-2316 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-2016-2316/ (Markdown: https://insights.sbomify.com/CVE-2016-2316/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-2316
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-2316
- OSV: https://osv.dev/vulnerability/CVE-2016-2316

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-2316/
Summaries are generated and may contain mistakes; the official description above is the record.