PT-2019-5773 · Squid+7 · Squid+8
Régis Leroy
·
Published
2019-11-14
·
Updated
2024-06-15
·
CVE-2019-18678
CVSS v3.1
5.3
Medium
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Squid versions 3.x through 4.8
Description
The issue allows attackers to smuggle HTTP requests through frontend software to a Squid instance, corrupting caches with attacker-controlled content at arbitrary URLs. This is related to a request header containing whitespace between a header name and a colon. The effects are isolated to software between the attacker client and Squid, with no effects on Squid itself or any upstream servers. The vulnerability is associated with a lack in the interpretation of HTTP requests, which can be exploited by a remote attacker to impact data integrity.
Recommendations
For Squid versions 3.x through 4.8, consider restricting access to the vulnerable request header processing mechanism until a patch is available. As a temporary workaround, avoid using request headers with whitespace between the header name and a colon to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
HTTP Request/Response Smuggling
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Red Hat
Rocky Linux
Squid
Squid Cache
Suse
Ubuntu