# CVE-2003-0487: Memory corruption in n/a

> Remote authenticated users can trigger buffer overflows in Kerio MailServer to cause denial of service or execute arbitrary code.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/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:** No
- **Published:** 28 Jun 2003
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-v352-gc7j-mw97

## What is CVE-2003-0487?

CVE-2003-0487 is a high-severity memory corruption vulnerability in n/a, published on 28 Jun 2003. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

## Which versions are affected by CVE-2003-0487?

It affects 1 product.


Products: Kerio Kerio Mailserver.

## How do I fix CVE-2003-0487?

No fix has been published for CVE-2003-0487 yet. Limit exposure of the affected software until one is available.

## Is CVE-2003-0487 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2003-0487 exists.

Public exploit code:

- Kerio MailServer 5.6.3 subscribe Module - Overflow (exploitdb)
- Kerio MailServer 5.6.3 add_acl Module - Overflow (exploitdb)
- Kerio MailServer 5.6.3 list Module - Overflow (exploitdb)
- Kerio MailServer 5.6.3 do_map Module - Overflow (exploitdb)
- Kerio MailServer 5.6.3 - Remote Buffer Overflow (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2007-3993](https://insights.sbomify.com/CVE-2007-3993/): Other in n/a (critical 10.0)
- [CVE-2004-2441](https://insights.sbomify.com/CVE-2004-2441/): Unspecified vulnerability in Kerio MailServer before 6.0.3 has unknown impact and unknown remote attack vectors, related to a "potential sec (critical 10.0)
- [CVE-2006-1158](https://insights.sbomify.com/CVE-2006-1158/): Denial of service in n/a (high 7.8)
- [CVE-2008-0858](https://insights.sbomify.com/CVE-2008-0858/): Memory corruption in n/a (high 7.5)
- [CVE-2005-1062](https://insights.sbomify.com/CVE-2005-1062/): Weak cryptography in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2003-0487 and fix it if it is affected.

What it is: CVE-2003-0487 is a high-severity memory corruption vulnerability in n/a, published on 28 Jun 2003. 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-2003-0487 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-2003-0487/ (Markdown: https://insights.sbomify.com/CVE-2003-0487/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2003-0487
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2003-0487
- OSV: https://osv.dev/vulnerability/CVE-2003-0487

---
From sbomify Insights: https://insights.sbomify.com/CVE-2003-0487/
Summaries are generated and may contain mistakes; the official description above is the record.