CVE-2021-21996 Exposure of Resource to Wrong Sphere in salt
High 7.5
Published
Updated
Check this codebase for CVE-2021-21996 and fix it if it is affected.
What it is: CVE-2021-21996 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 8 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-21996 in the wild and no public exploit code.
Affected packages and fixed versions:
- salt (PyPI): affected all versions; fixed in 3003.3
- salt (PyPI): affected all versions; fixed in 3003.3
- salt (PyPI): affected all versions; fixed in 3003.3
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-2021-21996/ (Markdown: https://insights.sbomify.com/CVE-2021-21996/index.md)
Attackers controlling source URLs can gain root file system access on Salt minions, requiring immediate upgrades to SaltStack Salt.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-21996?
CVE-2021-21996 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 8 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in SaltStack Salt before 3003.3. A user who has control of the source, and source_hash URLs can gain full file system access as root on a salt minion.
Which versions are affected by CVE-2021-21996?
3 open source packages ship an affected version, including salt. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
salt PyPI | All versions | 3003.3 |
salt PyPI | All versions | 3003.3 |
salt PyPI | All versions | 3003.3 |
Linux distribution packages (37)
salt SUSE:Enterprise Storage 6 | All versions | 3002.2-48.4 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 3002.2-48.4 |
salt SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 3002.2-48.4 |
salt SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 3002.2-8.41.17.1 |
salt SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 3002.2-8.41.17.1 |
salt SUSE:Linux Enterprise Micro 5.0 | All versions | 3002.2-49.2 |
salt SUSE:Linux Enterprise Micro 5.1 | All versions | 3002.2-50.1.15.1 |
salt SUSE:Linux Enterprise Module for Advanced Systems Management 12 | All versions | 3000-46.151.2 |
salt SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 3002.2-49.2 |
salt SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 3002.2-50.1.15.1 |
salt SUSE:Linux Enterprise Module for Server Applications 15 SP2 | All versions | 3002.2-49.2 |
salt SUSE:Linux Enterprise Module for Server Applications 15 SP3 | All versions | 3002.2-50.1.15.1 |
salt SUSE:Linux Enterprise Module for Transactional Server 15 SP2 | All versions | 3002.2-49.2 |
salt SUSE:Linux Enterprise Module for Transactional Server 15 SP3 | All versions | 3002.2-50.1.15.1 |
salt SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 2016.11.10-43.84.1 |
spacecmd SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.13-18.93.1 |
spacewalk-client-tools SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.14-27.59.1 |
salt SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 2016.11.10-43.84.1 |
spacecmd SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.13-18.93.1 |
spacewalk-client-tools SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.14-27.59.1 |
salt SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 3002.2-48.4 |
salt SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 3002.2-48.4 |
salt SUSE:Linux Enterprise Server 15-LTSS | All versions | 3002.2-8.41.17.1 |
salt SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 3002.2-8.41.17.1 |
salt SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 3002.2-48.4 |
salt SUSE:Manager Client Tools 12 | All versions | 3000-46.151.2 |
grafana-formula SUSE:Manager Server Module 4.1 | All versions | 0.4.2-3.12.2 |
prometheus-formula SUSE:Manager Server Module 4.1 | All versions | 0.3.4-3.12.2 |
py26-compat-salt SUSE:Manager Server Module 4.1 | All versions | 2016.11.10-17.2 |
py26-compat-tornado SUSE:Manager Server Module 4.1 | All versions | 4.2.1-3.3.2 |
py27-compat-salt SUSE:Manager Server Module 4.1 | All versions | 3000.3-6.15.2 |
spacecmd SUSE:Manager Server Module 4.1 | All versions | 4.1.15-4.30.2 |
spacewalk-backend SUSE:Manager Server Module 4.1 | All versions | 4.1.29-4.44.2 |
spacewalk-certs-tools SUSE:Manager Server Module 4.1 | All versions | 4.1.19-3.22.2 |
spacewalk-java SUSE:Manager Server Module 4.1 | All versions | 4.1.41-3.58.2 |
spacewalk-reports SUSE:Manager Server Module 4.1 | All versions | 4.1.4-3.6.2 |
spacewalk-web SUSE:Manager Server Module 4.1 | All versions | 4.1.30-3.36.1 |
Products include Debian Debian Linux, Fedoraproject Fedora, Saltstack Salt.
How do I fix CVE-2021-21996?
Upgrade salt to 3003.3 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-21996 being exploited?
There is no known exploitation of CVE-2021-21996 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DLA-2823-1, DSA-5011-1, GHSA-pf7h-h2wq-m7pg, PYSEC-2021-318, SUSE-SU-2021:14833-1, SUSE-SU-2021:3550-1 and 9 more.