CVE-2022-23959

varnish: HTTP/1 request smuggling vulnerability

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.

En Varnish Cache versiones anteriores a 6.6.2 y 7.x versiones anteriores a 7.0.2, Varnish Cache 6.0 LTS versiones anteriores a 6.0.10, y Varnish Enterprise (Cache Plus) 4.1.x versiones anteriores a 4.1.11r6 y 6.0.x versiones anteriores a 6.0.9r4, puede producirse contrabando de peticiones para conexiones HTTP/1

A flaw was found in Varnish. This flaw allows an attacker to carry out a request smuggling attack on HTTP/1 connections on Varnish cache servers. This smuggled request goes through the usual Varnish Configuration Language (VCL) processing since the Varnish server treats it as an additional request.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-01-26 CVE Reserved
2022-01-26 CVE Published
2024-08-03 CVE Updated
2024-10-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/02/msg00014.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://docs.varnish-software.com/security/VSV00008	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UMMDMQWNAE3BTSZUHXQHVAMZC5TLHLYT	2023-11-07
https://varnish-cache.org/security/VSV00008.html	2023-11-07
https://www.debian.org/security/2022/dsa-5088	2023-11-07
https://access.redhat.com/security/cve/CVE-2022-23959	2022-05-25
https://bugzilla.redhat.com/show_bug.cgi?id=2045031	2022-05-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Varnish-software Search vendor "Varnish-software"		Varnich Cache Search vendor "Varnish-software" for product "Varnich Cache"				>= 1.0.0 < 6.6.2 Search vendor "Varnish-software" for product "Varnich Cache" and version " >= 1.0.0 < 6.6.2"		-		Affected
Varnish-software Search vendor "Varnish-software"		Varnich Cache Search vendor "Varnish-software" for product "Varnich Cache"				>= 4.1.1 < 4.1.11r6 Search vendor "Varnish-software" for product "Varnich Cache" and version " >= 4.1.1 < 4.1.11r6"		plus		Affected
Varnish-software Search vendor "Varnish-software"		Varnich Cache Search vendor "Varnish-software" for product "Varnich Cache"				4.1 Search vendor "Varnish-software" for product "Varnich Cache" and version "4.1"		lts		Affected
Varnish-software Search vendor "Varnish-software"		Varnish Cache Search vendor "Varnish-software" for product "Varnish Cache"				>= 6.0.0 < 6.0.10 Search vendor "Varnish-software" for product "Varnish Cache" and version " >= 6.0.0 < 6.0.10"		lts		Affected
Varnish-software Search vendor "Varnish-software"		Varnish Cache Plus Search vendor "Varnish-software" for product "Varnish Cache Plus"				>= 6.0.0 < 6.0.9r4 Search vendor "Varnish-software" for product "Varnish Cache Plus" and version " >= 6.0.0 < 6.0.9r4"		-		Affected
Varnish Cache Project Search vendor "Varnish Cache Project"		Varnish Cache Search vendor "Varnish Cache Project" for product "Varnish Cache"				>= 7.0.0 < 7.0.2 Search vendor "Varnish Cache Project" for product "Varnish Cache" and version " >= 7.0.0 < 7.0.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		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
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected