DNS pin middleware can be tricked into DNS rebinding allowing SSRF
Package
Server
(Nextcloud)
Affected versions
>= 25.0.0, >= 26.0.0, >= 27.0.0
Patched versions
25.0.11, 26.0.6, 27.1.0
Server
(Nextcloud Enterprise)
>= 22.0.0, >= 23.0.0, >= 24.0.0, >= 25.0.0, >= 26.0.0, >= 27.0.0
22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, 27.1.0
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
References
For more information
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