CVE-2020-15163

Invalid root may become trusted root in The Update Framework (TUF)

Severity Score

8.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Python TUF (The Update Framework) reference implementation before version 0.12 it will incorrectly trust a previously downloaded root metadata file which failed verification at download time. This allows an attacker who is able to serve multiple new versions of root metadata (i.e. by a person-in-the-middle attack) culminating in a version which has not been correctly signed to control the trust chain for future updates. This is fixed in version 0.12 and newer.

Una implementación de referencia de Python TUF (The Update Framework) anterior a la versión 0.12, confiará incorrectamente en un archivo de metadatos root descargado previamente que presentó un fallo al verificar en el momento de la descarga. Esto permite a un atacante que es capaz servir múltiples versiones nuevas de metadatos root (es decir, mediante un ataque de tipo person-in-the-middle) culminar en una versión que no ha sido firmada correctamente para controlar la cadena de confianza de futuras actualizaciones. Esto es corregido en la versión 0.12 y mas recientes.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-06-25 CVE Reserved
2020-09-09 CVE Published
2023-03-07 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-345: Insufficient Verification of Data Authenticity
CWE-863: Incorrect Authorization

CAPEC

References (5)

URL	Tag	Source
https://github.com/theupdateframework/tuf/commit/3d342e648fbacdf43a13d7ba8886aaaf07334af7	Broken Link
https://github.com/theupdateframework/tuf/releases/tag/v0.12.0	Third Party Advisory
https://github.com/theupdateframework/tuf/security/advisories/GHSA-f8mr-jv2c-v8mg	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/theupdateframework/tuf/pull/885	2021-11-18

URL	Date	SRC
https://pypi.org/project/tuf	2021-11-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linuxfoundation Search vendor "Linuxfoundation"		The Update Framework Search vendor "Linuxfoundation" for product "The Update Framework"				< 0.12.0 Search vendor "Linuxfoundation" for product "The Update Framework" and version " < 0.12.0"		-		Affected