Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-16171

Severity CVSS v4.0:
Pending analysis
Type:
CWE-918 Server-Side Request Forgery (SSRF)
Publication date:
21/09/2020
Last modified:
01/10/2020

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
6.40
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:acronis:cyber_backup:*:*:*:*:*:*:*:* 12.5 (including)
cpe:2.3:a:acronis:cyber_backup:12.5:-:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:10130:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:10330:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:11010:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:13160:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:13400:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:14280:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:14330:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:16180:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:16318:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:16327:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:7641:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:7970:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_backup:12.5:8850:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools