# CVE-2012-10053: Simple Web Server Connection Header Buffer Overflow

> Remote attackers can execute arbitrary code via a stack-based buffer overflow in the Connection header of Simple Web Server.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Aug 2025
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-2c3g-g985-wqv4

## What is CVE-2012-10053?

CVE-2012-10053 is a critical memory corruption vulnerability in PMSoftware Simple Web Server, published on 8 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This flaw allows remote attackers to execute arbitrary code with the privileges of the web server process. The vulnerability is triggered before authentication.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2012-10053?


## How do I fix CVE-2012-10053?

No fix has been published for CVE-2012-10053 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-10053 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-10053 exists.

Public exploit code:

- S.O.M.P.L 1.0 Player Buffer Overflow (metasploit)
- Simple Web Server Connection Header Buffer Overflow (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-10053 and fix it if it is affected.

What it is: CVE-2012-10053 is a critical memory corruption vulnerability in PMSoftware Simple Web Server, published on 8 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-10053 exists.

Affected product: PMSoftware Simple Web Server. 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-2012-10053/ (Markdown: https://insights.sbomify.com/CVE-2012-10053/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-10053
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-10053
- OSV: https://osv.dev/vulnerability/CVE-2012-10053

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-10053/
Summaries are generated and may contain mistakes; the official description above is the record.