CVE-2016-6580

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.

Una implementación HTTP/2 construida usando cualquier versión de la librería de prioridad de Python anterior a la versión 1.2.0 podría ser atacado por un par malicioso teniendo ese par información de prioridad de asignación para cada posible ID de secuencia HTTP/2. El árbol de prioridad continuaría felizmente almacenando la información de prioridad para cada secuencia, y por tanto asignaría cantidades ilimitadas de memoria. Tratar de utilizar realmente un árbol como este provocaría también un uso extremadamente alto de la CPU para mantener el árbol.

*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

2016-08-03 CVE Reserved
2017-01-10 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/92311	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html	2017-01-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Python Priority Library Search vendor "Python" for product "Python Priority Library"				1.0.0 Search vendor "Python" for product "Python Priority Library" and version "1.0.0"		-		Affected
Python Search vendor "Python"		Python Priority Library Search vendor "Python" for product "Python Priority Library"				1.1.0 Search vendor "Python" for product "Python Priority Library" and version "1.1.0"		-		Affected
Python Search vendor "Python"		Python Priority Library Search vendor "Python" for product "Python Priority Library"				1.1.1 Search vendor "Python" for product "Python Priority Library" and version "1.1.1"		-		Affected