Description
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
Published: 2020-09-02
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2394-1 squid3 security update
Debian DSA Debian DSA DSA-4751-1 squid security update
EUVD EUVD EUVD-2020-7793 An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
Ubuntu USN Ubuntu USN USN-4477-1 Squid vulnerabilities
Ubuntu USN Ubuntu USN USN-4551-1 Squid vulnerabilities
History

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Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Fedoraproject Fedora
Opensuse Leap
Redhat Enterprise Linux Rhel E4s Rhel Eus
Squid-cache Squid
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T13:30:21.842Z

Reserved: 2020-07-17T00:00:00.000Z

Link: CVE-2020-15810

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-09-02T17:15:11.627

Modified: 2024-11-21T05:06:13.550

Link: CVE-2020-15810

cve-icon Redhat

Severity : Important

Publid Date: 2020-08-23T00:00:00Z

Links: CVE-2020-15810 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses