# CVE-2019-9579: Missing authorization in n/a

> An attacker with write extended attributes permissions can modify file permissions in the SMB server due to improper handling of ZFS extended attributes.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Dec 2022
- **Updated:** 14 Apr 2025
- **Also known as:** GHSA-79p4-hp34-c4rw

## What is CVE-2019-9579?

CVE-2019-9579 is a high-severity missing authorization vulnerability in Oracle Solaris, published on 26 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products. The SMB server allows an attacker to have unintended access, e.g., an attacker with WRITE_XATTR can change permissions. This occurs because of a combination of three factors: ZFS extended attributes are used to implement NT named streams, the SMB protocol requires implementations to have open handle semantics similar to those of NTFS, and the SMB server passes along certain attribute requests to the underlying object (i.e., they are not considered to be requests that pertain to the named stream).

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2019-9579?

It affects 2 products.


Products: Illumos Illumos, Oracle Solaris.

## How do I fix CVE-2019-9579?

No fix has been published for CVE-2019-9579 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9579 being exploited?

There is no known exploitation of CVE-2019-9579 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Solaris

- [CVE-2020-27678](https://insights.sbomify.com/CVE-2020-27678/): Memory corruption in n/a (critical 9.8)
- [CVE-2016-6560](https://insights.sbomify.com/CVE-2016-6560/): Integer overflow in osnet-incorporation (high 8.6)
- [CVE-2016-6561](https://insights.sbomify.com/CVE-2016-6561/): Null dereference in osnet-incorporation (high 7.5)
- [CVE-2021-43395](https://insights.sbomify.com/CVE-2021-43395/): Denial of service in n/a (medium 5.5)
- [CVE-2014-9491](https://insights.sbomify.com/CVE-2014-9491/): Null dereference in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9579 and fix it if it is affected.

What it is: CVE-2019-9579 is a high-severity missing authorization vulnerability in Oracle Solaris, published on 26 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-9579 in the wild and no public exploit code.

Affected product: Oracle Solaris. 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-2019-9579/ (Markdown: https://insights.sbomify.com/CVE-2019-9579/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9579
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9579
- OSV: https://osv.dev/vulnerability/CVE-2019-9579

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-9579/
Summaries are generated and may contain mistakes; the official description above is the record.