CVE-2020-16171 Server-side request forgery in n/a
Attackers can exploit a custom header in Acronis Cyber Backup API endpoints to perform Server-Side Request Forgery against internal localhost services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-16171?
CVE-2020-16171 is a medium-severity server-side request forgery vulnerability in n/a, published on 21 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2020-16171?
It affects 1 product.
Products include Acronis Cyber Backup.
How do I fix CVE-2020-16171?
No fix has been published for CVE-2020-16171 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2020-16171 being exploited?
There is no known exploitation of CVE-2020-16171 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in n/a
Sources
Also known as GHSA-2347-fp75-m9xc.