CVE-2021-34811 Server-side request forgery in Download Station
Remote authenticated users can access intranet resources via SSRF in Synology Download Station, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34811?
CVE-2021-34811 is a medium-severity server-side request forgery vulnerability in Synology Download Station, published on 18 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Server-Side Request Forgery (SSRF) vulnerability in task management component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to access intranet resources via unspecified vectors.
Weakness: CWE-918
Which versions are affected by CVE-2021-34811?
It affects 1 product.
Products include Synology Download Station.
How do I fix CVE-2021-34811?
No fix has been published for CVE-2021-34811 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-2021-34811 being exploited?
There is no known exploitation of CVE-2021-34811 in the wild and no public exploit code.
Other vulnerabilities in Synology Download Station
- CVE-2021-34809 Command injection in Download Station
- CVE-2021-34810 Privilege escalation in Download Station
- CVE-2017-11156 File upload in Synology Download Station
- CVE-2021-33184 Server-side request forgery in Synology Download Station
- CVE-2017-11149 Server-side request forgery in Synology Download Station
Sources
Also known as GHSA-h4r4-pw7f-hp8j.