CVE-2020-25097

squid: improper input validation may allow a trusted client to perform HTTP request smuggling

Severity Score

8.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.

Se detectó un problema en Squid versiones hasta 4.13 y versiones 5.x hasta 5.0.4. Debido a una comprobación inapropiada de la entrada, permite a un cliente confiable llevar a cabo un Trafico No Autorizado de Peticiones HTTP y acceder a servicios que de otro modo estarían prohibidos por los controles de seguridad. Esto ocurre para determinados ajustes de configuración de uri_whitespace

A flaw was found in squid. Due to improper validation while parsing the request URI, squid is vulnerable to HTTP request smuggling. This issue could allow a trusted client to perform an HTTP request smuggling attack and access services otherwise forbidden by squid. The highest threat from this vulnerability is to data confidentiality.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-03 CVE Reserved
2021-03-19 CVE Published
2023-12-03 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CAPEC

References (11)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210727-0010	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_11.patch	2023-11-07
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2020_11.patch	2023-11-07
https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DJMDRVV677AJL4BZAOLCT5LMFCGBZTC2	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBXFWKIGXPERDVQXG556LLPUOCMQGERC	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3RYBDMJCPYGOSURWDR3WJTE474UFT77	2023-11-07
https://security.gentoo.org/glsa/202105-14	2023-11-07
https://www.debian.org/security/2021/dsa-4873	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-25097	2021-05-19
https://bugzilla.redhat.com/show_bug.cgi?id=1939925	2021-05-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				>= 2.0 < 4.14 Search vendor "Squid-cache" for product "Squid" and version " >= 2.0 < 4.14"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				>= 5.0.1 < 5.0.5 Search vendor "Squid-cache" for product "Squid" and version " >= 5.0.1 < 5.0.5"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Netapp Search vendor "Netapp"		Cloud Manager Search vendor "Netapp" for product "Cloud Manager"				-		-		Affected