CVE-2019-18678

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

26/11/2019

Last modified:

07/11/2023

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

Base Score 3.x

5.30

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:squid-cache:squid::::::::	3.0 (including)	3.5.28 (including)
cpe:2.3:a:squid-cache:squid::::::::	4.0 (including)	4.8 (including)
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:19.04:::::::*
cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:fedoraproject:fedora:30:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:squid-cache:squid::::::::	3.0 (including)	3.5.28 (including)
cpe:2.3:a:squid-cache:squid::::::::	4.0 (including)	4.8 (including)
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:19.04:::::::*
cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:fedoraproject:fedora:30:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*

CVE-2019-18678

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools