NVD / CVE Program· CNA mitre

CVE-2021-31607: In SaltStack Salt 2016.9 through 3002.6, a command injection vulnerability exists in the snapper module that allows for local privilege…

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 5.9% (FIRST EPSS); higher than 93.3% of all records.
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: salt (Alpine:v3.13) 3003-r0; salt (Debian:9) 2016.11.2+ds-1+deb9u7; salt (openSUSE:Leap 15.2) 3002.2-lp152.3.36.1.

Low priority for now. Upgrade to salt (Alpine:v3.13) 3003-r0; salt (Debian:9) 2016.11.2+ds-1+deb9u7; salt (openSUSE:Leap 15.2) 3002.2-lp152.3.36.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

Published: Apr 23, 2021
Updated: Jun 16, 2026
EPSS: 5.9% · 93th percentile
CWE: CWE-78

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 5.9%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
saltstack	salt	cpe:2.3:a:saltstack:salt
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

fedoraproject fedora33
fedoraproject fedora34
fedoraproject fedora35
saltstack salt2016.9 and later · up to 3002.6 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.13	salt	from 2016.9 · before 3003-r0	3003-r0
Debian:9	salt	before 2016.11.2+ds-1+deb9u7	2016.11.2+ds-1+deb9u7
openSUSE:Leap 15.2	salt	before 3002.2-lp152.3.36.1	3002.2-lp152.3.36.1
openSUSE:Leap 15.3	python-distro	before 1.5.0-3.5.1	1.5.0-3.5.1
openSUSE:Leap 15.3	salt	before 3002.2-8.41.8.1	3002.2-8.41.8.1
PyPI	salt	from 2016.11.0 · before 3003rc1	3003rc1
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS	salt	before 3002.2-37.1	3002.2-37.1
SUSE:Linux Enterprise Module for Basesystem 15 SP2	python-distro	before 1.5.0-3.5.1	1.5.0-3.5.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3	salt	before 3002.2-8.41.8.1	3002.2-8.41.8.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	golang-github-wrouesnel-postgres_exporter	before 0.4.7-5.12.1	0.4.7-5.12.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-cfg	before 4.2.2-5.15.2	4.2.2-5.15.2
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-custom-info	before 4.2.1-5.9.2	4.2.1-5.9.2
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-daemon	before 4.2.7-5.26.1	4.2.7-5.26.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-osad	before 4.2.5-5.27.2	4.2.5-5.27.2
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-push	before 4.2.2-5.9.2	4.2.2-5.9.2
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	mgr-virtualization	before 4.2.1-5.17.3	4.2.1-5.17.3
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	rhnlib	before 4.2.3-12.31.1	4.2.3-12.31.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	salt	before 2016.11.10-43.75.1	2016.11.10-43.75.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	spacecmd	before 4.2.8-18.84.1	4.2.8-18.84.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	spacewalk-client-tools	before 4.2.10-27.50.1	4.2.10-27.50.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	spacewalk-koan	before 4.2.3-9.21.1	4.2.3-9.21.1
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	spacewalk-oscap	before 4.2.1-6.15.3	4.2.1-6.15.3
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	spacewalk-remote-utils	before 4.2.1-6.18.2	4.2.1-6.18.2
SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	supportutils-plugin-susemanager-client	before 4.2.2-9.21.1	4.2.2-9.21.1

+42

Same product

saltstack: all records

Other highest-scoring records for the same primary product.

CVE-2020-16846An issue was discovered in SaltStack Salt through 3002.KEV
99Now
CVE-2020-11651An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2.KEV
98Now
CVE-2020-11652An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2.KEV
82Now

Published before and after this one in the same product

← EarlierCVE-2021-3148Feb 27, 2021 · An issue was discovered in SaltStack Salt before 3002.5.
41Plan
← EarlierCVE-2021-3197Feb 27, 2021 · An issue was discovered in SaltStack Salt before 3002.5.
61This week
Later →CVE-2021-21996Sep 8, 2021 · An issue was discovered in SaltStack Salt before 3003.3.
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:salt	3003-r0 · Alpine:v3.13	Package registry (OSV)
debian:salt	2016.11.2+ds-1+deb9u7 · Debian:9	Package registry (OSV)
opensuse:python-distro	1.5.0-3.5.1 · openSUSE:Leap 15.3	Package registry (OSV)
opensuse:salt	3002.2-lp152.3.36.1 · openSUSE:Leap 15.2	Package registry (OSV)
PyPI:salt	3003rc1	Package registry (OSV)
suse:golang-github-wrouesnel-postgres_exporter	0.4.7-5.12.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-cfg	4.2.2-5.15.2 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-custom-info	4.2.1-5.9.2 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-daemon	4.2.7-5.26.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-osad	4.2.5-5.27.2 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-push	4.2.2-5.9.2 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:mgr-virtualization	4.2.1-5.17.3 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:rhnlib	4.2.3-12.31.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:salt	2016.11.10-43.75.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:spacecmd	4.2.8-18.84.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:spacewalk-client-tools	4.2.10-27.50.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)
suse:spacewalk-koan	4.2.3-9.21.1 · SUSE:Linux Enterprise Server 11 SP3-CLIENT-TOOLS	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2021-2528155 days apartAn issue was discovered in through SaltStack Salt before 3002.5.
61This week

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const host = req.body.host;
2exec("ping -c 1 " + host, onResult);

Fixed

1const host = req.body.host;
2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);
3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.debian.org/debian-lts-announce/2021/11/msg00009.html

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records