CVE-2020-16171
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.
Does this matter?
Lower severity and a low EPSS score (5.50%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 5.50% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- acronis/cyber backup
- Source
- cve@mitre.org
References
- http://seclists.org/fulldisclosure/2020/Sep/33Exploit, Mailing List, Third Party Advisory
- https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Sep/33Exploit, Mailing List, Third Party Advisory
- https://www.rcesecurity.com/2020/09/CVE-2020-16171-Exploiting-Acronis-Cyber-Backup-for-Fun-and-Emails/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.