NextcloudGHSA-8F69-F9JG-4X3VDNS pin middleware can be tricked into DNS rebinding allowing SSRF
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
29.9%
Description
Impact
The DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result.
Patches
It is recommended that the Nextcloud Server is upgraded to 25.0.11, 26.0.6 or 27.1.0
It is recommended that the Nextcloud Enterprise Server is upgraded to 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6 or 27.1.0
Workarounds
- No workaround available
References
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at portal.nextcloud.com
Related
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
29.9%