CVE-2021-32566

Specific sequence of HTTP/2 frames can cause ATS to crash

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 HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Una vulnerabilidad de comprobación inapropiada de entrada en HTTP/2 de Apache Traffic Server, permite a un atacante realizar un DOS en el servidor. Este problema afecta a Apache Traffic Server versiones 7.0.0 hasta 7.1.12, versiones 8.0.0 hasta 8.1.1, versiones 9.0.0 hasta 9.0.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-11 CVE Reserved
2021-06-30 CVE Published
2024-05-22 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.apache.org/thread.html/ra1a41ff92a70d25bf576d7da2590575e8ff430393a3f4a0c34de4277%40%3Cusers.trafficserver.apache.org%3E	2021-09-20
https://www.debian.org/security/2021/dsa-4957	2021-09-20

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"				>= 7.0.0 <= 7.1.12 Search vendor "Apache" for product "Traffic Server" and version " >= 7.0.0 <= 7.1.12"		-		Affected
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 8.0.0 <= 8.1.1 Search vendor "Apache" for product "Traffic Server" and version " >= 8.0.0 <= 8.1.1"		-		Affected
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 9.0.0 <= 9.0.1 Search vendor "Apache" for product "Traffic Server" and version " >= 9.0.0 <= 9.0.1"		-		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