Security Advisory
ZAA-2020-24
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Security Advisory Details
- ID: ZAA-2020-24
- Date: 11/16/2020
- Title: Incorrect Access Control when updating Articles via the REST API
- Severity: medium
- Product: Zammad 1.0.x up to 3.5.0
- Fixed in: Zammad 3.5.1, 3.6.0
- References:
--> CVE: 2020-29160
Vulnerability Descriptions
Incorrect Access Control when updating Articles via the REST API
Zammad comes with a functionality to update the State of a Ticket Article from external to internal and vice versa. Other from that it's not possible to update an Article via the WebApp. However, it's possible to update any Article attribute via the REST API for any User with access to the Ticket e.g. regular Agents, User who created the Article. This violates audit-proof principle that Zammad has.
Recommended Resolution
This vulnerability is fixed in the latest versions of Zammad and it is recommended to upgrade to one of these.
Fixed releases can be found at:
- https://zammad.org/
- https://ftp.zammad.com/
Or just update your Zammad if installed via OS package manager.
Additional information
Online version of this advisory: https://zammad.com/en/advisories/zaa-2020-24
Send all remarks to security issues to security@zammad.com.