# CVE-2011-0517: Memory corruption in n/a

> Remote attackers can execute arbitrary code or cause denial of service via crafted packets to the TCP/IP server in Winlog Pro.

- **Severity:** Critical 9.3 (`AV:N/AC:M/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jan 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-m9xq-xgvf-jw86

## What is CVE-2011-0517?

CVE-2011-0517 is a critical memory corruption vulnerability in n/a, published on 20 Jan 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Stack-based buffer overflow in Sielco Sistemi Winlog Pro 2.07.00 and earlier, when Run TCP/IP server is enabled, allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a crafted 0x02 opcode to TCP port 46823.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2011-0517?

It affects 1 product.


Products: Sielcosistemi Winlog Pro.

## How do I fix CVE-2011-0517?

No fix has been published for CVE-2011-0517 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-0517 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0517 exists.

Public exploit code:

- Sielco Sistemi Winlog Buffer Overflow (metasploit)
- Sielco Sistemi Winlog 2.07.00 - Stack Overflow (exploitdb)
- Sielco Sistemi Winlog - Remote Buffer Overflow (Metasploit) (exploitdb)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-0517 and fix it if it is affected.

What it is: CVE-2011-0517 is a critical memory corruption vulnerability in n/a, published on 20 Jan 2011. 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-2011-0517 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-2011-0517/ (Markdown: https://insights.sbomify.com/CVE-2011-0517/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0517
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0517
- OSV: https://osv.dev/vulnerability/CVE-2011-0517

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-0517/
Summaries are generated and may contain mistakes; the official description above is the record.