CVE-2021-34808 Server-side request forgery in Media Server

What is CVE-2021-34808?

CVE-2021-34808 is a medium-severity server-side request forgery vulnerability in Synology Media Server, published on 18 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Server-Side Request Forgery (SSRF) vulnerability in cgi component in Synology Media Server before 1.8.3-2881 allows remote attackers to access intranet resources via unspecified vectors.

Weakness: CWE-918

Which versions are affected by CVE-2021-34808?

It affects 1 product.

Products include Synology Media Server.

How do I fix CVE-2021-34808?

No fix has been published for CVE-2021-34808 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-2021-34808 being exploited?

There is no known exploitation of CVE-2021-34808 in the wild and no public exploit code.

Other vulnerabilities in Synology Media Server

• CVE-2022-22683 Memory corruption in Media Server Critical 10.0
• CVE-2024-4464 Missing authorization in Media Server High 7.5
• CVE-2021-33180 SQL injection in Synology Media Server High 7.3
• CVE-2018-8914 SQL injection in Media Server High 7.3
• CVE-2022-27614 Information disclosure in Media Server Medium 5.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x9fw-v6jg-w952.