CVE-2019-15613 Business logic in Nextcloud Server
High 8.0
Published
Updated
Check this codebase for CVE-2019-15613 and fix it if it is affected.
What it is: CVE-2019-15613 is a high-severity vulnerability in Nextcloud Nextcloud Server, published on 4 Feb 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-15613 in the wild and no public exploit code.
Affected product: Nextcloud Nextcloud Server. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2019-15613/ (Markdown: https://insights.sbomify.com/CVE-2019-15613/index.md)
Attackers can bypass workflow rules by manipulating file extensions, allowing unauthorized actions based on incorrect mimetype checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-15613?
CVE-2019-15613 is a high-severity vulnerability in Nextcloud Nextcloud Server, published on 4 Feb 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file extension when checking file mimetypes.
Which versions are affected by CVE-2019-15613?
It affects 2 products.
Products include Nextcloud Nextcloud Server, Opensuse Backports.
How do I fix CVE-2019-15613?
Upgrade to a fixed version.
Is CVE-2019-15613 being exploited?
There is no known exploitation of CVE-2019-15613 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-rc6x-59rr-4g8r, MGASA-2020-0099.