CVE-2020-16171

Acronis Cyber Backup 12.5 Build 16341 - Unauthenticated SSRF

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Acronis Cyber Backup before 12.5 Build 16342. Some API endpoints on port 9877 under /api/ams/ accept an additional custom Shard header. The value of this header is afterwards used in a separate web request issued by the application itself. This can be abused to conduct SSRF attacks against otherwise unreachable Acronis services that are bound to localhost such as the NotificationService on 127.0.0.1:30572.

Se detectó un problema en Acronis Cyber ??Backup versiones anteriores a 12.5 Build 16342. Algunos endpoints de la API en el puerto 9877 en /api/ams/ aceptan un encabezado Shard personalizado adicional. El valor de este encabezado es usado posteriormente en una petición web separada emitida por la propia aplicación. Esto puede ser abusado para conducir ataques de tipo SSRF contra servicios de Acronis que de otro modo serían inalcanzables y que están vinculados a localhost, tal y como NotificationService versión 127.0.0.1:30572

Acronis Cyber Backup version 12.5 Build 16341 suffers from a server-side request forgery vulnerability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-31 CVE Reserved
2020-09-16 CVE Published
2020-11-27 First Exploit
2024-06-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-918: Server-Side Request Forgery (SSRF)

CAPEC

References (3)

URL	Tag	Source
https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/49113	2020-11-27
http://seclists.org/fulldisclosure/2020/Sep/33	2024-08-04

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
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				<= 12.5 Search vendor "Acronis" for product "Cyber Backup" and version " <= 12.5"		-		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		-		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		10130		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		10330		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		11010		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		13160		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		13400		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		14280		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		14330		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		16180		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		16318		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		16327		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		7641		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		7970		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		8850		Affected
Acronis Search vendor "Acronis"		Cyber Backup Search vendor "Acronis" for product "Cyber Backup"				12.5 Search vendor "Acronis" for product "Cyber Backup" and version "12.5"		9010		Affected