NetSight
IP …
medium5.3

CVE-2019-18678

An issue was discovered in Squid 3.x and 4.x through 4.8.

Impact

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 products

VendorProductAffected versions
Squid-CacheSquid
from 3.0 through 3.5.28
from 4.0 through 4.8
CanonicalUbuntu Linux
Versions 16.04, 18.04, 19.04, 19.10
DebianDebian Linux
Version 8.0
FedoraprojectFedora
Versions 30, 31

Weakness classification

CWE-444

References