# CVE-2003-0955: Memory corruption in n/a

> Local attackers can trigger a kernel panic or execute arbitrary code via stack-based buffer overflows in OpenBSD kernel emulation and ELF handling.

- **Severity:** Medium 4.6 (`AV:L/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Nov 2003
- **Updated:** 8 Aug 2024
- **Also known as:** CVE-2003-1147, GHSA-563f-qfcg-wp9f

## What is CVE-2003-0955?

CVE-2003-0955 is a medium-severity memory corruption vulnerability in Openbsd Openbsd, published on 21 Nov 2003. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code in 3.4 via a program with an invalid header that is not properly handled by (1) ibcs2_exec.c in the iBCS2 emulation (compat_ibcs2) or (2) exec_elf.c, which leads to a stack-based buffer overflow.

## Which versions are affected by CVE-2003-0955?

It affects 1 product.


Products: Openbsd Openbsd.

## How do I fix CVE-2003-0955?

No fix has been published for CVE-2003-0955 yet. Limit exposure of the affected software until one is available.

## Is CVE-2003-0955 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2003-0955 exists.

Public exploit code:

- OpenBSD - 'ibcs2_exec' Kernel Code Execution (exploitdb)
- OpenBSD 2.x < 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflow (exploitdb)

## Other vulnerabilities in Openbsd Openbsd

- [CVE-2007-1365](https://insights.sbomify.com/CVE-2007-1365/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0220](https://insights.sbomify.com/CVE-2004-0220/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0083](https://insights.sbomify.com/CVE-2004-0083/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0084](https://insights.sbomify.com/CVE-2004-0084/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0284](https://insights.sbomify.com/CVE-2001-0284/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2003-0955 and fix it if it is affected.

What it is: CVE-2003-0955 is a medium-severity memory corruption vulnerability in Openbsd Openbsd, published on 21 Nov 2003. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2003-0955 exists.

Affected product: Openbsd Openbsd. 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-2003-0955/ (Markdown: https://insights.sbomify.com/CVE-2003-0955/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2003-0955
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2003-0955
- OSV: https://osv.dev/vulnerability/CVE-2003-0955

---
From sbomify Insights: https://insights.sbomify.com/CVE-2003-0955/
Summaries are generated and may contain mistakes; the official description above is the record.