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CVE-2021-4142· NVD / CVE Program· CNA redhat

The Candlepin component of Red Hat Satellite was affected by an improper authentication flaw.

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.17% (FIRST EPSS).
  • 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: foreman (Red Hat:satellite_capsule:6.11::el7) 0:3.1.1.21-2.el7sat; libsolv (Red Hat:satellite_capsule:6.11::el7) 0:0.7.22-1.el7pc; satellite (Red Hat:satellite_capsule:6.11::el7) 0:6.11.0-2.el7sat.

Low priority for now. Upgrade to foreman (Red Hat:satellite_capsule:6.11::el7) 0:3.1.1.21-2.el7sat; libsolv (Red Hat:satellite_capsule:6.11::el7) 0:0.7.22-1.el7pc; satellite (Red Hat:satellite_capsule:6.11::el7) 0:6.11.0-2.el7sat 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

The Candlepin component of Red Hat Satellite was affected by an improper authentication flaw. Few factors could allow an attacker to use the SCA (simple content access) certificate for authentication with Candlepin.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 24, 2022
Updated
Jun 17, 2026
EPSS
0.2% · 6th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-4142

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
candlepinprojectcandlepin

Affected versions

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

  • candlepinproject candlepin3.1.0 and later · up to 3.1.28-2 inclusive
  • candlepinproject candlepin3.2.0 and later · up to 3.2.21-1 inclusive
  • candlepinproject candlepin4.1.0 and later · up to 4.1.8-1 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a candlepin

    • Affects v3.1.28-2, v3.2.21-1, v4.1.8-1 and earlier are affected.affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Red Hat:satellite_capsule:6.11::el7foremanbefore 0:3.1.1.21-2.el7sat0:3.1.1.21-2.el7sat
Red Hat:satellite_capsule:6.11::el7libsolvbefore 0:0.7.22-1.el7pc0:0.7.22-1.el7pc
Red Hat:satellite_capsule:6.11::el7satellitebefore 0:6.11.0-2.el7sat0:6.11.0-2.el7sat
Red Hat:satellite_capsule:6.11::el8foremanbefore 0:3.1.1.21-2.el8sat0:3.1.1.21-2.el8sat
Red Hat:satellite_capsule:6.11::el8libsolvbefore 0:0.7.22-1.el8pc0:0.7.22-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-djangobefore 0:3.2.13-1.el8pc0:3.2.13-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-lxmlbefore 0:4.7.1-1.el8pc0:4.7.1-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-sqlparsebefore 0:0.4.2-2.el8pc0:0.4.2-2.el8pc
Red Hat:satellite_capsule:6.11::el8python38-djangobefore 0:3.2.13-1.el8pc0:3.2.13-1.el8pc
Red Hat:satellite_capsule:6.11::el8satellitebefore 0:6.11.0-2.el8sat0:6.11.0-2.el8sat
Red Hat:satellite:6.10::el7candlepinbefore 0:4.0.15-1.el7sat0:4.0.15-1.el7sat
Red Hat:satellite:6.10::el7candlepin-selinuxbefore 0:4.0.15-1.el7sat0:4.0.15-1.el7sat
Red Hat:satellite:6.11::el7candlepinbefore 0:4.1.13-1.el7sat0:4.1.13-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-actionpackbefore 0:6.0.4.7-1.el7sat0:6.0.4.7-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-pumabefore 0:5.6.2-1.el7sat0:5.6.2-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-puma-debuginfobefore 0:5.6.2-1.el7sat0:5.6.2-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-sidekiqbefore 0:5.2.10-1.el7sat0:5.2.10-1.el7sat
Red Hat:satellite:6.11::el8candlepinbefore 0:4.1.13-1.el8sat0:4.1.13-1.el8sat
Red Hat:satellite:6.11::el8rubygem-actionpackbefore 0:6.0.4.7-1.el8sat0:6.0.4.7-1.el8sat
Red Hat:satellite:6.11::el8rubygem-pumabefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-puma-debuginfobefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-puma-debugsourcebefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-sidekiqbefore 0:5.2.10-1.el8sat0:5.2.10-1.el8sat
Rocky Linux:8libdbbefore 0:5.3.28-42.el8_40:5.3.28-42.el8_4

Other highest-scoring records for the same primary product.

  • CVE-2023-1832Improper authorization check in the server component
    32Monitor
  • CVE-2015-5187Candlepin allows remote attackers to obtain sensitive information by obtaining Java exception statements as a result of excessive web traffi
    27Monitor
  • CVE-2012-6119Candlepin before 0.7.24, as used in Red Hat Subscription Asset Manager before 1.2.1, does not properly check manifest signatures, which allo
    8Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
red hat:candlepin0:4.0.15-1.el7sat · Red Hat:satellite:6.10::el7Package registry (OSV)
red hat:candlepin-selinux0:4.0.15-1.el7sat · Red Hat:satellite:6.10::el7Package registry (OSV)
red hat:foreman0:3.1.1.21-2.el7sat · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:libsolv0:0.7.22-1.el7pc · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:python-django0:3.2.13-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python-lxml0:4.7.1-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python-sqlparse0:0.4.2-2.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python38-django0:3.2.13-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:rubygem-puma0:5.6.2-1.el8sat · Red Hat:satellite:6.11::el8Package registry (OSV)
red hat:satellite0:6.11.0-2.el7sat · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:tfm-rubygem-puma0:5.6.2-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
red hat:tfm-rubygem-sidekiq0:5.2.10-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
rocky linux:libdb0:5.3.28-42.el8_4 · Rocky Linux:8Package 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.

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.

No nightly-computed relations.

Chain candidates

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

—

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

CVSS vector

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

nvd-primary

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

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

Vulnerable

ts
const invoice = await Invoice.findById(req.params.id);res.json(invoice);

Fixed

ts
const invoice = await Invoice.findOne({  id: req.params.id,  ownerId: req.user.id,});if (!invoice) return res.sendStatus(404);res.json(invoice);

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

All records