CVE-2021-31607: Salt Command Injection Vulnerability
HIGHCVE-2021-31607 is a HIGH (CVSS 7.8) command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Salt libraries in the PyPI ecosystem. The issue involves command injection in saltstack salt. Remediation is available by upgrading affected packages to version 3003rc1.
CVE-2021-31607 at a Glance
Security Impact
CVSS: 7.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2021-31607
To remediate this vulnerability, upgrade all affected Salt dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install salt>=3003rc1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show saltHow to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2021-31607, inspect your installed packages using pip:
pip show saltAnalyze the terminal output to locate any version of Salt in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3003rc1), your application is affected.
Note: The pip show salt command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Salt, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-31607 Affected Salt Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
salt
|
PyPI |
≥ 2016.11.0
< 3003rc1
|
3003rc1
|
References
Frequently Asked Questions
What is CVE-2021-31607?
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What version fixes CVE-2021-31607?
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What CWE is associated with CVE-2021-31607?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-hcjf-rp5h-g5h3",
"modified" : "2024-10-23T18:32:07Z",
"published" : "2022-05-24T17:48:21Z",
"aliases" : [ "CVE-2021-31607" ],
"summary" : "Command Injection in SaltStack Salt",
"details" : "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).",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "salt"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2016.11.0"
}, {
"fixed" : "3003rc1"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 3002.6"
}
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-31607"
}, {
"type" : "WEB",
"url" : "https://github.com/pypa/advisory-database/tree/main/vulns/salt/PYSEC-2021-56.yaml"
}, {
"type" : "WEB",
"url" : "https://lists.debian.org/debian-lts-announce/2021/11/msg00009.html"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6BUWUF5VTENNP2ZYZBVFKPSUHLKLUBD5"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ACVT7M4YLZRLWWQ6SGRK3C6TOF4FXOXT"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDKMAJXYFHM4USVX3H5V2GCCBGASWUSM"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MBAHHSGZLEJRCG4DX6J4RBWJAAWH55RQ"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6BUWUF5VTENNP2ZYZBVFKPSUHLKLUBD5"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ACVT7M4YLZRLWWQ6SGRK3C6TOF4FXOXT"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LDKMAJXYFHM4USVX3H5V2GCCBGASWUSM"
}, {
"type" : "WEB",
"url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MBAHHSGZLEJRCG4DX6J4RBWJAAWH55RQ"
}, {
"type" : "WEB",
"url" : "https://sec.stealthcopter.com/saltstack-snapper-minion-privledge-escaltion"
}, {
"type" : "WEB",
"url" : "https://security.gentoo.org/glsa/202310-22"
}, {
"type" : "WEB",
"url" : "https://www.debian.org/security/2021/dsa-5011"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-77", "CWE-78" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2022-06-23T06:37:59Z",
"nvd_published_at" : "2021-04-23T06:15:00Z"
}
}