NetSight
IP …
critical9.1

CVE-2019-12523

An issue was discovered in Squid before 4.9.

Impact

An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.

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
FedoraprojectFedora
Versions 30, 31
OpensuseLeap
Version 15.0
DebianDebian Linux
Versions 9.0, 10.0

References