# CVE-2010-4767: Denial of service in n/a

> Remote attackers can cause denial of service by sending crafted emails with invalid UTF-8 characters to the OTRS ticket system.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Mar 2011
- **Updated:** 17 Sep 2024
- **Also known as:** DEBIAN-CVE-2010-4767, GHSA-w9x9-fc49-2chx

## What is CVE-2010-4767?

CVE-2010-4767 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 18 Mar 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Open Ticket Request System (OTRS) before 2.3.6 does not properly handle e-mail messages in which the From line contains UTF-8 characters associated with diacritical marks and an invalid charset, which allows remote attackers to cause a denial of service (duplicate tickets and duplicate auto-responses) by sending a crafted message to a POP3 mailbox.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2010-4767?

It affects 1 product.


Products: Otrs Otrs.

## How do I fix CVE-2010-4767?

Upgrade to a fixed version.

## Is CVE-2010-4767 being exploited?

There is no known exploitation of CVE-2010-4767 in the wild and no public exploit code.

## Other vulnerabilities in Otrs Otrs

- [CVE-2026-48188](https://insights.sbomify.com/CVE-2026-48188/): SQL Injection via MySQL Quote Method (critical 9.1)
- [CVE-2013-4717](https://insights.sbomify.com/CVE-2013-4717/): SQL injection in n/a (high 8.8)
- [CVE-2017-14635](https://insights.sbomify.com/CVE-2017-14635/): Code injection in n/a (high 8.8)
- [CVE-2023-5422](https://insights.sbomify.com/CVE-2023-5422/): SSL Certificates are not checked for E-Mail Handling (high 8.7)
- [CVE-2023-6254](https://insights.sbomify.com/CVE-2023-6254/): Password is send back to client (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2010-4767 and fix it if it is affected.

What it is: CVE-2010-4767 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 18 Mar 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2010-4767 in the wild and no public exploit code.

Affected product: Otrs Otrs. 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-2010-4767/ (Markdown: https://insights.sbomify.com/CVE-2010-4767/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2010-4767
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2010-4767
- OSV: https://osv.dev/vulnerability/CVE-2010-4767

---
From sbomify Insights: https://insights.sbomify.com/CVE-2010-4767/
Summaries are generated and may contain mistakes; the official description above is the record.