RHSA-2021:2025HighCVSS 8.6

Red Hat Security Advisory: squid:4 security update

Published
May 19, 2021
Last Modified
November 5, 2026

🔗 CVE IDs covered (1)

CVE-2020-25097 →

📋 Description

CVE-2020-25097 — squid: improper input validation may allow a trusted client to perform HTTP request smuggling

🎯 Affected products62

  • Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.src (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.src (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debuginfo-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.s390x (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-debugsource-0:1.0.1-2.module+el8.1.0+4044+36416a77.x86_64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)
  • libecap-devel-0:1.0.1-2.module+el8.1.0+4044+36416a77.aarch64 (squid:4) as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • +32 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically. Workaround: This flaw can be mitigated by setting the `uri_whitespace` directive in squid.conf to either: ``` uri_whitespace deny ``` or ``` uri_whitespace encode ```

🔗 References (4)