# CVE-2007-3764: Denial of service in n/a

> Remote attackers can crash Asterisk PBX via crafted Skinny protocol packets causing memory corruption, requiring immediate software upgrades.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Jul 2007
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2007-3764, GHSA-c8c6-m3x8-7cq5

## What is CVE-2007-3764?

CVE-2007-3764 is a medium-severity denial of service vulnerability in n/a, published on 18 Jul 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Skinny channel driver (chan_skinny) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition before B.2.2.1, AsteriskNOW before beta7, Appliance Developer Kit before 0.5.0, and s800i before 1.0.2 allows remote attackers to cause a denial of service (crash) via a certain data length value in a crafted packet, which results in an "overly large memcpy."

## Which versions are affected by CVE-2007-3764?

It affects 4 products.


Products: Asterisk Asterisk, Asterisk Asterisk Appliance Developer Kit, Asterisk Asterisknow, Asterisk S800i Appliance.

## How do I fix CVE-2007-3764?

Upgrade to a fixed version.

## Is CVE-2007-3764 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-3764 exists.

Public exploit code:

- Asterisk < 1.2.22/1.4.8/2.2.1 - 'chan_skinny' Remote Denial of Service (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2007-2488](https://insights.sbomify.com/CVE-2007-2488/): Null dereference in n/a (critical 10.0)
- [CVE-2008-1390](https://insights.sbomify.com/CVE-2008-1390/): Weak cryptography in n/a (critical 9.3)
- [CVE-2007-3762](https://insights.sbomify.com/CVE-2007-3762/): Memory corruption in n/a (critical 9.3)
- [CVE-2008-1332](https://insights.sbomify.com/CVE-2008-1332/): Auth bypass in n/a (high 8.8)
- [CVE-2008-3263](https://insights.sbomify.com/CVE-2008-3263/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-3764 and fix it if it is affected.

What it is: CVE-2007-3764 is a medium-severity denial of service vulnerability in n/a, published on 18 Jul 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-3764 exists.

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-2007-3764/ (Markdown: https://insights.sbomify.com/CVE-2007-3764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-3764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-3764
- OSV: https://osv.dev/vulnerability/CVE-2007-3764

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-3764/
Summaries are generated and may contain mistakes; the official description above is the record.