# CVE-2024-28871: Excessive CPU used on malformed traffic

> Attackers can cause excessive CPU usage and denial of service by sending malformed HTTP traffic to applications using the LibHTP library.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 Apr 2024
- **Updated:** 26 Aug 2024
- **Also known as:** DEBIAN-CVE-2024-28871, GHSA-ffr2-45w9-7wmg, UBUNTU-CVE-2024-28871, openSUSE-SU-2024:14016-1

## What is CVE-2024-28871?

CVE-2024-28871 is a high-severity denial of service vulnerability in OISF libhtp, published on 4 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Version 0.5.46 may parse malformed request traffic, leading to excessive CPU usage. Version 0.5.47 contains a patch for the issue. No known workarounds are available.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2024-28871?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `libhtp` | openSUSE:Tumbleweed | All versions | 0.5.48-2.1 |

Products: Oisf Libhtp.

## How do I fix CVE-2024-28871?

Upgrade to a fixed version.

## Is CVE-2024-28871 being exploited?

There is no known exploitation of CVE-2024-28871 in the wild and no public exploit code.

## Other vulnerabilities in OISF libhtp

- [CVE-2018-10243](https://insights.sbomify.com/CVE-2018-10243/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-53537](https://insights.sbomify.com/CVE-2025-53537/): LibHTP's memory leak with lzma can lead to resource starvation (high 7.5)
- [CVE-2024-45797](https://insights.sbomify.com/CVE-2024-45797/): LibHTP's unbounded header handling leads to denial service (high 7.5)
- [CVE-2015-0928](https://insights.sbomify.com/CVE-2015-0928/): Null dereference in n/a (high 7.5)
- [CVE-2019-17420](https://insights.sbomify.com/CVE-2019-17420/): Security feature bypass in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-28871 and fix it if it is affected.

What it is: CVE-2024-28871 is a high-severity denial of service vulnerability in OISF libhtp, published on 4 Apr 2024. 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-2024-28871 in the wild and no public exploit code.

Affected product: OISF libhtp. 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-2024-28871/ (Markdown: https://insights.sbomify.com/CVE-2024-28871/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-28871
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-28871
- OSV: https://osv.dev/vulnerability/CVE-2024-28871

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-28871/
Summaries are generated and may contain mistakes; the official description above is the record.