---
title: "CVE-2024-45802\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-2024-45802?format=md
keywords: index, follow
---

# CVE-2024-45802

Publication date 28 October 2024

Last updated 11 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2024-45802?format=md#impact-score)

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## Description

Squid is an open source caching proxy for the Web supporting HTTP, HTTPS,
FTP, and more. Due to Input Validation, Premature Release of Resource
During Expected Lifetime, and Missing Release of Resource after Effective
Lifetime bugs, Squid is vulnerable to Denial of Service attacks by a
trusted server against all clients using the proxy. This bug is fixed in
the default build configuration of Squid version 6.10.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2024-45802?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| squid | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Ignored end of life, was ignored [see notes] |
| 24.04 LTS noble | Ignored see notes |
| 22.04 LTS jammy | Ignored see notes |
| 20.04 LTS focal | Ignored end of standard support, was ignored [see notes] |
| squid3 | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 25.04 plucky | Not in release |
| 24.10 oracular | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 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)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

Upstream have fixed this vulnerability by disabling ESI by
default. Ubuntu packages would have to be updated to disable ESI
to fix this issue, which would be a breaking change and could
possibly be considered a regression in functionality.
Debian disabled ESI in 6.12-1
Red Hat has disabled ESI in stable releases

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45802)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2024-45802)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2024-45802)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2024-45802)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2024-45802>
* <https://github.com/squid-cache/squid/security/advisories/GHSA-f975-v7qw-q7hj>