HTTP Request Smuggling Affecting squid package, versions <4.13-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-DEBIAN13-SQUID-5696272
  • published24 Aug 2020
  • disclosed2 Sept 2020

Introduced: 24 Aug 2020

CVE-2020-15810  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Debian:13 squid to version 4.13-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squid package and not the squid package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

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.

CVSS Scores

version 3.1