CVE-2021-37147

Request Smuggling - LF line ending

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.

Una vulnerabilidad de comprobación de entrada inapropiada en el análisis de encabezados de Apache Traffic Server permite a un atacante contrabandear peticiones. Este problema afecta a Apache Traffic Server versiones 8.0.0 a 8.1.2 y 9.0.0 a 9.1.0

*Credits: Apache Traffic Server would like to thank Mattias Grenfeldt and Asta Olofsson for reporting this issue.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-21 CVE Reserved
2021-11-03 CVE Published
2024-07-19 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 (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164	2024-06-10

URL	Date	SRC
https://www.debian.org/security/2022/dsa-5153	2024-06-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 8.0.0 <= 8.1.2 Search vendor "Apache" for product "Traffic Server" and version " >= 8.0.0 <= 8.1.2"		-		Affected
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 9.0.0 <= 9.1.0 Search vendor "Apache" for product "Traffic Server" and version " >= 9.0.0 <= 9.1.0"		-		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