# CVE-2013-2028: Integer overflow in n/a

> Remote attackers can execute arbitrary code or cause a denial of service via a crafted chunked Transfer-Encoding request in nginx.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jul 2013
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-68mc-8233-5xrw

## What is CVE-2013-2028?

CVE-2013-2028 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Jul 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2013-2028?

It affects 2 products.


Products: F5 Nginx, Fedoraproject Fedora.

## How do I fix CVE-2013-2028?

No fix has been published for CVE-2013-2028 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-2028 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-2028 exists.

Public exploit code:

- Exploitation Training -- CVE-2013-2028: Nginx Stack Based Buffer Overflow (github_poc): https://github.com/kitctf/nginxpwn
- For the analysis of CVE-2013-2028 (github_poc): https://github.com/danghvu/nginx-1.4.0
- CVE-2013-2028 python exploit (github_poc): https://github.com/m4drat/CVE-2013-2028-Exploit
- this is not stable (github_poc): https://github.com/tachibana51/CVE-2013-2028-x64-bypass-ssp-and-pie-PoC
- A CVE-2013-2028 implementation (github_poc): https://github.com/jptr218/nginxhack
- Nginx HTTP Server 1.3.9-1.4.0 Chunked Encoding Stack Buffer Overflow (metasploit)

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2016-1247](https://insights.sbomify.com/CVE-2016-1247/): Path traversal in n/a (high 7.8)
- [CVE-2021-23017](https://insights.sbomify.com/CVE-2021-23017/): Memory corruption in Nginx Web Server, Nginx Plus (high 7.7)
- [CVE-2014-0088](https://insights.sbomify.com/CVE-2014-0088/): Memory corruption in n/a (high 7.5)
- [CVE-2014-0133](https://insights.sbomify.com/CVE-2014-0133/): Memory corruption in n/a (high 7.5)
- [CVE-2013-4547](https://insights.sbomify.com/CVE-2013-4547/): Security feature bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-2028 and fix it if it is affected.

What it is: CVE-2013-2028 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Jul 2013. 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-2013-2028 exists.

Affected product: Fedoraproject Fedora. 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-2013-2028/ (Markdown: https://insights.sbomify.com/CVE-2013-2028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-2028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-2028
- OSV: https://osv.dev/vulnerability/CVE-2013-2028

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-2028/
Summaries are generated and may contain mistakes; the official description above is the record.