Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF
CVE-2023-48306

9.8CRITICAL

Key Information:

Vendor

nextcloud
Status
security-advisories
Vendor
CVE Published:
21 November 2023

What is CVE-2023-48306?

Nextcloud Server allows data storage through its open-source cloud platform, but a vulnerability in its DNS pin middleware enables attackers to carry out DNS rebinding attacks, which could result in Server-Side Request Forgery (SSRF). The flaw affects numerous versions of both Nextcloud Server and Nextcloud Enterprise Server prior to the latest security updates. Users are advised to upgrade to the patched versions to mitigate risks, as no effective workarounds are available.

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Deploy the Patch

Affected Version(s)

security-advisories >= 22.0.0, < 22.2.10.16 < 22.0.0, 22.2.10.16

security-advisories >= 23.0.0, < 23.0.12.11 < 23.0.0, 23.0.12.11

security-advisories >= 24.0.0, < 24.0.12.7 < 24.0.0, 24.0.12.7

References

https://github.com/nextcloud/security-advisories/security...
x_refsource_CONFIRM
https://github.com/nextcloud/server/pull/40234
x_refsource_MISC
https://hackerone.com/reports/2115212
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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