Synology Drive Server: Missing Authentication for Critical Functionality
CVE-2024-50630 is a high-severity missing authentication for critical functionality vulnerability in Synology Drive Server from Synology, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 3.0.4-12699, 3.5.1-26102, 3.5.0-26085 as the first without the flaw, so updating Synology Drive Server to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 24.6% chance of exploitation within 30 days, which is in the top 2.09% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update Synology Drive Server to 3.0.4-12699 or 3.5.1-26102 or 3.5.0-26085 or 3.2.1-23280, whichever matches your release line, or a later version.
- Update Drive Server to 3.0.4-12699 or 3.2.1-23280 or 3.5.0-26085 or 3.5.1-26102, whichever matches your release line, or a later version.
- Read the advisory on synology.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Synology | Synology Drive Server | before 3.0.4-12699; before 3.5.1-26102; before 3.5.0-26085; before 3.2.1-23280 | 3.0.4-12699, 3.5.1-26102, 3.5.0-26085, 3.2.1-23280 |
| Synology | Drive Server | before 3.0.4-12699; before 3.2.1-23280; before 3.5.0-26085; before 3.5.1-26102 | 3.0.4-12699, 3.2.1-23280, 3.5.0-26085, 3.5.1-26102 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (synology.com).
Official description
Missing authentication for critical function vulnerability in the webapi component in Synology Drive Server before 3.0.4-12699, 3.2.1-23280, 3.5.0-26085 and 3.5.1-26102 allows remote attackers to obtain administrator credentials via unspecified vectors.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Synology Drive Server
- 7.5 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 9.1 Critical severity
- 8.3 High severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
Spotted an error? Tell us.