# CVE-2018-1000024: squid: The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Poin...

CVE-2018-1000024 is fixed in 6 products on 1 platform, first by squid 3.5.23-5ubuntu2, released January 28, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-1000024
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0793
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 28, 2018

## Description

The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Pointer Handling vulnerability in ESI Response Processing that can result in Denial of Service for all clients using the proxy.. This attack appear to be exploitable via Remote server delivers an HTTP response payload containing valid but unusual ESI syntax.. This vulnerability appears to have been fixed in 4.0.23 and later.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | squid Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squid 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squid-3.5.23-5ubuntu2.md) | Jan 28, 2018 |
| Linux | squid-cgi Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squid-cgi 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squid-cgi-3.5.23-5ubuntu2.md) | Jan 28, 2018 |
| Linux | squid-common Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squid-common 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squid-common-3.5.23-5ubuntu2.md) | Jan 28, 2018 |
| Linux | squid-purge Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squid-purge 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squid-purge-3.5.23-5ubuntu2.md) | Jan 28, 2018 |
| Linux | squid3 Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squid3 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squid3-3.5.23-5ubuntu2.md) | Jan 28, 2018 |
| Linux | squidclient Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | [squidclient 3.5.23-5ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-squidclient-3.5.23-5ubuntu2.md) | Jan 28, 2018 |

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Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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