# CVE-2007-4996: Denial of service in n/a

> Remote attackers can crash Pidgin by sending MSN nudge messages to users not on their buddy list, causing a denial of service.

- **Severity:** Medium 4.3 (`AV:N/AC:M/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:** 1 Oct 2007
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2007-4996, GHSA-r9v7-jgpj-m4mq

## What is CVE-2007-4996?

CVE-2007-4996 is a medium-severity denial of service vulnerability in Pidgin Pidgin, published on 1 Oct 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

libpurple in Pidgin before 2.2.1 does not properly handle MSN nudge messages from users who are not on the receiver's buddy list, which allows remote attackers to cause a denial of service (crash) via a nudge message that triggers an access of "an invalid memory location."

## Which versions are affected by CVE-2007-4996?

It affects 1 product.


Products: Pidgin Pidgin.

## How do I fix CVE-2007-4996?

Upgrade to a fixed version.

## Is CVE-2007-4996 being exploited?

There is no known exploitation of CVE-2007-4996 in the wild and no public exploit code.

## Other vulnerabilities in Pidgin Pidgin

- [CVE-2013-6490](https://insights.sbomify.com/CVE-2013-6490/): Memory corruption in n/a (critical 10.0)
- [CVE-2016-1000030](https://insights.sbomify.com/CVE-2016-1000030/): Code injection in n/a (critical 9.8)
- [CVE-2013-6486](https://insights.sbomify.com/CVE-2013-6486/): Command injection in n/a (critical 9.3)
- [CVE-2011-3185](https://insights.sbomify.com/CVE-2011-3185/): Command injection in n/a (critical 9.3)
- [CVE-2009-1376](https://insights.sbomify.com/CVE-2009-1376/): Integer overflow in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-4996 and fix it if it is affected.

What it is: CVE-2007-4996 is a medium-severity denial of service vulnerability in Pidgin Pidgin, published on 1 Oct 2007. 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-2007-4996 in the wild and no public exploit code.

Affected product: Pidgin Pidgin. 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-2007-4996/ (Markdown: https://insights.sbomify.com/CVE-2007-4996/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-4996
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-4996
- OSV: https://osv.dev/vulnerability/CVE-2007-4996

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-4996/
Summaries are generated and may contain mistakes; the official description above is the record.