Improper Input Validation Affecting squid:4/squid package, versions <7:4.11-3.module+el8.3.0+7851+7808b5f9


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.04% (85th percentile)

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  • Snyk IDSNYK-RHEL8-SQUID-3904084
  • published26 Jul 2021
  • disclosed5 Nov 2019

Introduced: 5 Nov 2019

CVE-2019-18678  (opens in a new tab)
CWE-20  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:8 squid:4/squid to version 7:4.11-3.module+el8.3.0+7851+7808b5f9 or higher.
This issue was patched in RHSA-2020:4743.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squid:4/squid package and not the squid:4/squid package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon.

CVSS Scores

version 3.1