What is the severity of CVE-2017-0883?

CVE-2017-0883 is rated as moderate severity due to the potential for unauthorized access and modification of shared files.

How do I fix CVE-2017-0883?

To fix CVE-2017-0883, upgrade Nextcloud Server to version 9.0.55 or later, or to version 10.0.3 or later.

Who is affected by CVE-2017-0883?

CVE-2017-0883 affects Nextcloud Server versions prior to 9.0.55 and exactly 10.0.2.

What kind of attack does CVE-2017-0883 enable?

CVE-2017-0883 enables authenticated adversaries to reshare files with increased permissions, potentially allowing them to edit files.

Is user authentication required to exploit CVE-2017-0883?

Yes, an attacker must be authenticated to exploit CVE-2017-0883 and perform unauthorized resharing of files.

Vulnerability/
CVE-2017-0883

medium

6.4

CWE

732 275

5/4/2017

5/8/2024

CVE-2017-0883

First published: Wed Apr 05 2017(Updated: )

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.

Credit: support@hackerone.com

Affected Software	Affected Version	How to fix
Nextcloud Server	<=9.0.54
Nextcloud Server	=10.0.2

Remedy

https://nextcloud.com/security/advisory/?id=nc-sa-2017-001

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2017-0883?
CVE-2017-0883 is rated as moderate severity due to the potential for unauthorized access and modification of shared files.
How do I fix CVE-2017-0883?
To fix CVE-2017-0883, upgrade Nextcloud Server to version 9.0.55 or later, or to version 10.0.3 or later.
Who is affected by CVE-2017-0883?
CVE-2017-0883 affects Nextcloud Server versions prior to 9.0.55 and exactly 10.0.2.
What kind of attack does CVE-2017-0883 enable?
CVE-2017-0883 enables authenticated adversaries to reshare files with increased permissions, potentially allowing them to edit files.
Is user authentication required to exploit CVE-2017-0883?
Yes, an attacker must be authenticated to exploit CVE-2017-0883 and perform unauthorized resharing of files.

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agent/last-modified-date
agent/event
agent/description
agent/first-publish-date
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/nextcloud
canonical/nextcloud server
version/nextcloud server/9.0.54
version/nextcloud server/10.0.2

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