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Nextcloud Server < 15.0.14, 16.x < 16.0.7, 17.x < 17.0.2 SSRF Vulnerability (NC-SA-2020-014)

Information

Severity

Severity

Medium

Family

Family

Web application abuses

CVSSv2 Base

CVSSv2 Base

6.5

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

4 years ago

Summary

Nextcloud Server is prone to a server-side request forgery protection bypass vulnerability in calendar subscriptions.

Insight

Insight

A missing check for IPv4 nested inside IPv6 in Nextcloud serer allows a SSRF when subscribing to a malicious calendar URL.

Affected Software

Affected Software

Nextcloud server versions prior 15.0.14, 16.x and 17.x.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 15.0.14, 16.0.7, 17.0.2 or later.

Common Vulnerabilities and Exposures (CVE)