# CVE-2007-4639: Null dereference in n/a

> Authenticated users can crash the database daemon or potentially execute code by invoking specific debugging functions before initialization.

- **Severity:** Medium 6.5 (`AV:N/AC:L/Au:S/C:P/I:P/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:** 31 Aug 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-f4fh-29cp-vmcg, RHSA-2007:0895

## What is CVE-2007-4639?

CVE-2007-4639 is a medium-severity vulnerability in n/a, published on 31 Aug 2007. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

EnterpriseDB Advanced Server 8.2 does not properly handle certain debugging function calls that occur before a call to pldbg_create_listener, which allows remote authenticated users to cause a denial of service (daemon crash) and possibly execute arbitrary code via a SELECT statement that invokes a pldbg_ function, as demonstrated by (1) pldbg_get_stack and (2) pldbg_abort_target, which triggers use of an uninitialized pointer.

Weakness: CWE-824 (Access of Uninitialized Pointer)

## Which versions are affected by CVE-2007-4639?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `EnterpriseDB` | Red Hat:rhx_enterprisedb_advanced_server:7.2 | All versions | 0:8.1.9.27-1 |

Products: Enterprisedb Postgres Advanced Server.

## How do I fix CVE-2007-4639?

Apply the vendor's patch.

## Is CVE-2007-4639 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4639 exists.

Public exploit code:

- EnterpriseDB Advanced Server 8.2 - Uninitialized Pointer (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2023-41117](https://insights.sbomify.com/CVE-2023-41117/): Path traversal in n/a (high 8.8)
- [CVE-2023-41118](https://insights.sbomify.com/CVE-2023-41118/): Missing authorization in n/a (high 8.8)
- [CVE-2023-41119](https://insights.sbomify.com/CVE-2023-41119/): Privilege escalation in n/a (high 8.8)
- [CVE-2023-31043](https://insights.sbomify.com/CVE-2023-31043/): Information disclosure in n/a (high 7.5)
- [CVE-2023-41114](https://insights.sbomify.com/CVE-2023-41114/): Path traversal in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-4639 and fix it if it is affected.

What it is: CVE-2007-4639 is a medium-severity vulnerability in n/a, published on 31 Aug 2007. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4639 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-2007-4639/ (Markdown: https://insights.sbomify.com/CVE-2007-4639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-4639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-4639
- OSV: https://osv.dev/vulnerability/CVE-2007-4639

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-4639/
Summaries are generated and may contain mistakes; the official description above is the record.