CVE-2020-15098

Missing Required Cryptographic Step Leading to Sensitive Information Disclosure in TYPO3 CMS

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, it has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains including potential privilege escalation, insecure deserialization & remote code execution. The overall severity of this vulnerability is high based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). This has been patched in versions 9.5.20 and 10.4.6.

En TYPO3 CMS versiones posteriores o igual a 9.0.0 y anteriores a 9.5.20, y versiones posteriores o igual a 10.0.0 y anteriores a 10.4.6, se ha detectado que puede ser usado un mecanismo de verificación interna para generar sumas de comprobación arbitrarias. Esto permite inyectar datos arbitrarios que tienen un código de autenticación de mensaje criptográfico válido (HMAC-SHA1) y puede conllevar a varias cadenas de ataque, incluyendo una escalada potencial de privilegios, una deserialización no segura y una ejecución de código remota. La gravedad general de esta vulnerabilidad es alta según las cadenas de ataque mencionadas y el requisito de tener una sesión de usuario del backend válida (autenticada). Esto ha sido parcheado en las versiones 9.5.20 y 10.4.6

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-06-25 CVE Reserved
2020-07-29 CVE Published
2023-03-07 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-325: Missing Cryptographic Step
CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CWE-502: Deserialization of Untrusted Data

CAPEC

References (4)

URL	Tag	Source
https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1	Broken Link
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxp	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://typo3.org/security/advisory/typo3-core-sa-2016-013	2021-11-18
https://typo3.org/security/advisory/typo3-core-sa-2020-008	2021-11-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Typo3 Search vendor "Typo3"		Typo3 Search vendor "Typo3" for product "Typo3"				>= 9.0.0 < 9.5.20 Search vendor "Typo3" for product "Typo3" and version " >= 9.0.0 < 9.5.20"		-		Affected
Typo3 Search vendor "Typo3"		Typo3 Search vendor "Typo3" for product "Typo3"				>= 10.0.0 < 10.4.6 Search vendor "Typo3" for product "Typo3" and version " >= 10.0.0 < 10.4.6"		-		Affected