---
title: "CVE-2024-35161\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2024-35161?format=md
keywords: index, follow
---

# CVE-2024-35161

Publication date 26 July 2024

Last updated 11 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**9.1 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2024-35161?format=md#impact-score)

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## Description

Apache Traffic Server forwards malformed HTTP chunked trailer section to
origin servers. This can be utilized for request smuggling and may also
lead cache poisoning if the origin servers are vulnerable.
This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from
9.0.0 through 9.2.4.
Users can set a new setting (proxy.config.http.drop\_chunked\_trailers) not
to forward chunked trailer section.
Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes
the issue.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| trafficserver | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not affected |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Vulnerable |
| 22.04 LTS jammy | Vulnerable |
| 20.04 LTS focal | Vulnerable |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.1 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.1 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35161)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2024-35161)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2024-35161)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2024-35161)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2024-35161>
* <https://www.openwall.com/lists/oss-security/2024/07/25/1>
* <https://lists.apache.org/thread/c4mcmpblgl8kkmyt56t23543gp8v56m0>