# CVE-2011-1843: Integer overflow in conf.c in Tinyproxy before 1.8.3 might allow remote attackers to bypass intended access restrictions in opportunistic ci


- **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 3 May 2011
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2011-1843, GHSA-xm8h-gm5v-cggh

## What is CVE-2011-1843?

CVE-2011-1843 is a medium-severity vulnerability in n/a, published on 3 May 2011. 

### Official description

Integer overflow in conf.c in Tinyproxy before 1.8.3 might allow remote attackers to bypass intended access restrictions in opportunistic circumstances via a TCP connection, related to improper handling of invalid port numbers.

Weakness: CWE-189

## Which versions are affected by CVE-2011-1843?

It affects 1 product.


Products: Banu Tinyproxy.

## How do I fix CVE-2011-1843?

Upgrade to a fixed version.

## Is CVE-2011-1843 being exploited?

There is no known exploitation of CVE-2011-1843 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2012-3505](https://insights.sbomify.com/CVE-2012-3505/): Denial of service in n/a (medium 5.0)
- [CVE-2011-1499](https://insights.sbomify.com/CVE-2011-1499/): Misconfiguration in n/a (low 2.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1843 and fix it if it is affected.

What it is: CVE-2011-1843 is a medium-severity vulnerability in n/a, published on 3 May 2011. 
Exploitation: There is no known exploitation of CVE-2011-1843 in the wild and no public exploit code.

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-2011-1843/ (Markdown: https://insights.sbomify.com/CVE-2011-1843/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1843
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1843
- OSV: https://osv.dev/vulnerability/CVE-2011-1843

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1843/
Summaries are generated and may contain mistakes; the official description above is the record.