# CVE-2021-31607: Command Injection in SaltStack Salt > Local attackers can escalate privileges on SaltStack minions via command injection in the snapper module when specific files are backed up. - **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 23 Apr 2021 - **Updated:** 3 Aug 2024 - **Also known as:** GHSA-hcjf-rp5h-g5h3, PYSEC-2021-56, SUSE-SU-2021:14753-1, SUSE-SU-2021:1688-1, SUSE-SU-2021:1951-1, SUSE-SU-2021:2102-1, UBUNTU-CVE-2021-31607, openSUSE-SU-2021:1951-1 ## What is CVE-2021-31607? CVE-2021-31607 is a high-severity command injection vulnerability in Fedoraproject Fedora, published on 23 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description In SaltStack Salt 2016.9 through 3002.6, a command injection vulnerability exists in the snapper module that allows for local privilege escalation on a minion. The attack requires that a file is created with a pathname that is backed up by snapper, and that the master calls the snapper.diff function (which executes popen unsafely). Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command) ## Which versions are affected by CVE-2021-31607? 3 open source packages ship an affected version, including salt. It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `salt` | PyPI | From 2016.11.0 | 3003rc1 | | `salt` | PyPI | From 2016.11.0 | 3003rc1 | | `salt` | PyPI | From 2016.11.0 | 3003rc1 | | `salt` | SUSE:Linux Enterprise Module for Advanced Systems Management 12 | All versions | 3000-46.142.2 | | `salt` | SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 3002.2-8.41.8.1 | | `salt` | SUSE:Linux Enterprise Module for Server Applications 15 SP3 | All versions | 3002.2-8.41.8.1 | | `salt` | SUSE:Linux Enterprise Module for Transactional Server 15 SP3 | All versions | 3002.2-8.41.8.1 | | `golang-github-wrouesnel-postgres_exporter` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 0.4.7-5.12.1 | | `mgr-cfg` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.2-5.15.2 | | `mgr-custom-info` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.1-5.9.2 | | `mgr-daemon` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.7-5.26.1 | | `mgr-osad` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.5-5.27.2 | | `mgr-push` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.2-5.9.2 | | `mgr-virtualization` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.1-5.17.3 | | `rhnlib` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.3-12.31.1 | | `salt` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 2016.11.10-43.75.1 | | `spacecmd` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.8-18.84.1 | | `spacewalk-client-tools` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.10-27.50.1 | | `spacewalk-koan` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.3-9.21.1 | | `spacewalk-oscap` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.1-6.15.3 | | `spacewalk-remote-utils` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.1-6.18.2 | | `supportutils-plugin-susemanager-client` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.2-9.21.1 | | `suseRegisterInfo` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.3-6.15.1 | | `uyuni-common-libs` | SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS | All versions | 4.2.3-5.12.1 | | `golang-github-wrouesnel-postgres_exporter` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 0.4.7-5.12.1 | | `mgr-cfg` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.2-5.15.2 | | `mgr-custom-info` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.1-5.9.2 | | `mgr-daemon` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.7-5.26.1 | | `mgr-osad` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.5-5.27.2 | | `mgr-push` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.2-5.9.2 | | `mgr-virtualization` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.1-5.17.3 | | `rhnlib` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.3-12.31.1 | | `salt` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 2016.11.10-43.75.1 | | `spacecmd` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.8-18.84.1 | | `spacewalk-client-tools` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.10-27.50.1 | | `spacewalk-koan` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.3-9.21.1 | | `spacewalk-oscap` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.1-6.15.3 | | `spacewalk-remote-utils` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.1-6.18.2 | | `supportutils-plugin-susemanager-client` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.2-9.21.1 | | `suseRegisterInfo` | SUSE:Linux Enterprise Server 11 SP4-CLIENT-TOOLS | All versions | 4.2.3-6.15.1 | Products: Fedoraproject Fedora, Saltstack Salt. ## How do I fix CVE-2021-31607? Upgrade salt to 3003rc1 or later. ## Is CVE-2021-31607 being exploited? There is no known exploitation of CVE-2021-31607 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2021-31607 and fix it if it is affected. What it is: CVE-2021-31607 is a high-severity command injection vulnerability in Fedoraproject Fedora, published on 23 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2021-31607 in the wild and no public exploit code. Affected packages and fixed versions: - salt (PyPI): affected from 2016.11.0; fixed in 3003rc1 - salt (PyPI): affected from 2016.11.0; fixed in 3003rc1 - salt (PyPI): affected from 2016.11.0; fixed in 3003rc1 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-2021-31607/ (Markdown: https://insights.sbomify.com/CVE-2021-31607/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2021-31607 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-31607 - OSV: https://osv.dev/vulnerability/CVE-2021-31607 --- From sbomify Insights: https://insights.sbomify.com/CVE-2021-31607/ Summaries are generated and may contain mistakes; the official description above is the record.