CVE-2016-6817

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

El parser de cabecera HTTP/2 en Apache Tomcat en sus versiones 9.0.0.M1 a 9.0.0.M11 y 8.5.0 a 8.5.6 entraba en un bucle infinito si la cabecera recibida era mayor que el búfer disponible. Esto hizo que fuese posible realizar un ataque de denegación de servicio.

*Credits: N/A

CVSS Scores

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

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:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2016-08-12 CVE Reserved
2017-08-10 CVE Published
2024-10-15 CVE Updated
2024-10-16 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (8)

URL	Tag	Source
http://www.securityfocus.com/bid/94462	Third Party Advisory
http://www.securitytracker.com/id/1037330	Third Party Advisory
https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E	Mailing List
https://security.netapp.com/advisory/ntap-20180607-0001	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.0 Search vendor "Apache" for product "Tomcat" and version "8.5.0"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.1 Search vendor "Apache" for product "Tomcat" and version "8.5.1"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.2 Search vendor "Apache" for product "Tomcat" and version "8.5.2"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.3 Search vendor "Apache" for product "Tomcat" and version "8.5.3"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.4 Search vendor "Apache" for product "Tomcat" and version "8.5.4"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.5 Search vendor "Apache" for product "Tomcat" and version "8.5.5"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				8.5.6 Search vendor "Apache" for product "Tomcat" and version "8.5.6"		-		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone1		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone10		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone11		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone2		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone3		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone4		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone5		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone6		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone7		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone8		Affected
Apache Search vendor "Apache"		Tomcat Search vendor "Apache" for product "Tomcat"				9.0.0 Search vendor "Apache" for product "Tomcat" and version "9.0.0"		milestone9		Affected