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CVE-2019-18678

Description

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.


Affected Software


CPE Name Name Version
squid-cache:squid squid-cache squid 3.5.28
squid-cache:squid squid-cache squid 4.8
canonical:ubuntu_linux canonical ubuntu linux 16.04
canonical:ubuntu_linux canonical ubuntu linux 18.04
canonical:ubuntu_linux canonical ubuntu linux 19.04
canonical:ubuntu_linux canonical ubuntu linux 19.10
debian:debian_linux debian debian linux 8.0
fedoraproject:fedora fedoraproject fedora 30
fedoraproject:fedora fedoraproject fedora 31

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