# CVE-2008-0095: Null dereference in n/a

> Remote attackers can crash the Asterisk daemon via a malformed SIP BYE message, causing a denial of service.

- **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:** 8 Jan 2008
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2008-0095, GHSA-hvrv-phcf-pfqg

## What is CVE-2008-0095?

CVE-2008-0095 is a medium-severity vulnerability in n/a, published on 8 Jan 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SIP channel driver in Asterisk Open Source 1.4.x before 1.4.17, Business Edition before C.1.0-beta8, AsteriskNOW before beta7, Appliance Developer Kit before Asterisk 1.4 revision 95946, and Appliance s800i 1.0.x before 1.0.3.4 allows remote attackers to cause a denial of service (daemon crash) via a BYE message with an Also (Also transfer) header, which triggers a NULL pointer dereference.

Weakness: CWE-399

## Which versions are affected by CVE-2008-0095?

It affects 5 products.


Products: Asterisk Asterisk Appliance Developer Kit, Asterisk Asterisk Business Edition, Asterisk Asterisknow, Asterisk Open Source, Asterisk S800i.

## How do I fix CVE-2008-0095?

Upgrade to a fixed version.

## Is CVE-2008-0095 being exploited?

There is no known exploitation of CVE-2008-0095 in the wild and no public exploit code.

Public exploit code:

- Asterisk 1.x - BYE Message Remote Denial of Service (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2008-3264](https://insights.sbomify.com/CVE-2008-3264/): Denial of service in n/a (high 7.8)
- [CVE-2008-1289](https://insights.sbomify.com/CVE-2008-1289/): Memory corruption in n/a (high 7.5)
- [CVE-2008-1923](https://insights.sbomify.com/CVE-2008-1923/): Denial of service in n/a (high 7.1)
- [CVE-2008-1897](https://insights.sbomify.com/CVE-2008-1897/): Denial of service in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2008-0095 and fix it if it is affected.

What it is: CVE-2008-0095 is a medium-severity vulnerability in n/a, published on 8 Jan 2008. 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-2008-0095 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-2008-0095/ (Markdown: https://insights.sbomify.com/CVE-2008-0095/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2008-0095
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2008-0095
- OSV: https://osv.dev/vulnerability/CVE-2008-0095

---
From sbomify Insights: https://insights.sbomify.com/CVE-2008-0095/
Summaries are generated and may contain mistakes; the official description above is the record.