Vulnerability-Lookup

RHSA-2026:29009

Vulnerability from csaf_redhat - Published: 2026-06-24 11:58 - Updated: 2026-09-06 22:44

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: systemd: * systemd-261-2.hum1 (aarch64, x86_64) * systemd-boot-unsigned-261-2.hum1 (aarch64, x86_64) * systemd-container-261-2.hum1 (aarch64, x86_64) * systemd-devel-261-2.hum1 (aarch64, x86_64) * systemd-journal-remote-261-2.hum1 (aarch64, x86_64) * systemd-libs-261-2.hum1 (aarch64, x86_64) * systemd-networkd-261-2.hum1 (aarch64, x86_64) * systemd-networkd-defaults-261-2.hum1 (noarch) * systemd-oomd-defaults-261-2.hum1 (noarch) * systemd-pam-261-2.hum1 (aarch64, x86_64) * systemd-resolved-261-2.hum1 (aarch64, x86_64) * systemd-rpm-macros-261-2.hum1 (noarch) * systemd-shared-261-2.hum1 (aarch64, x86_64) * systemd-standalone-repart-261-2.hum1 (aarch64, x86_64) * systemd-standalone-shutdown-261-2.hum1 (aarch64, x86_64) * systemd-standalone-sysusers-261-2.hum1 (aarch64, x86_64) * systemd-standalone-tmpfiles-261-2.hum1 (aarch64, x86_64) * systemd-sysusers-261-2.hum1 (aarch64, x86_64) * systemd-tests-261-2.hum1 (aarch64, x86_64) * systemd-udev-261-2.hum1 (aarch64, x86_64) * systemd-ukify-261-2.hum1 (noarch) * systemd-261-2.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2024-5300

A flaw was found in Canonical snapd. The base AppArmor security profile configuration in snapd inadvertently allows strictly confined snap applications to bypass intended sandbox restrictions. This enables a compromised or malicious snap application, when running as root, to access sensitive system password hashes from the systemd-userdbd service, leading to information disclosure. This issue is mitigated on systems where the systemd-userdbd service is not installed by default.

5.6 (Medium)


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

CWE-1220 - Insufficient Granularity of Access Control

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:systemd-main@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:systemd-main@noarch	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:systemd-main@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:systemd-main@x86_64	—	Vendor Fix fix

Threats

Impact Moderate

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:29009	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2024-5300	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2024-5300	self
https://bugzilla.redhat.com/show_bug.cgi?id=2503660	external
https://www.cve.org/CVERecord?id=CVE-2024-5300	external
https://nvd.nist.gov/vuln/detail/CVE-2024-5300	external
https://ubuntu.com/security/CVE-2024-5300	external

JSON

To clipboard

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        "text": "This update includes the following RPMs:\n\nsystemd:\n  * systemd-261-2.hum1 (aarch64, x86_64)\n  * systemd-boot-unsigned-261-2.hum1 (aarch64, x86_64)\n  * systemd-container-261-2.hum1 (aarch64, x86_64)\n  * systemd-devel-261-2.hum1 (aarch64, x86_64)\n  * systemd-journal-remote-261-2.hum1 (aarch64, x86_64)\n  * systemd-libs-261-2.hum1 (aarch64, x86_64)\n  * systemd-networkd-261-2.hum1 (aarch64, x86_64)\n  * systemd-networkd-defaults-261-2.hum1 (noarch)\n  * systemd-oomd-defaults-261-2.hum1 (noarch)\n  * systemd-pam-261-2.hum1 (aarch64, x86_64)\n  * systemd-resolved-261-2.hum1 (aarch64, x86_64)\n  * systemd-rpm-macros-261-2.hum1 (noarch)\n  * systemd-shared-261-2.hum1 (aarch64, x86_64)\n  * systemd-standalone-repart-261-2.hum1 (aarch64, x86_64)\n  * systemd-standalone-shutdown-261-2.hum1 (aarch64, x86_64)\n  * systemd-standalone-sysusers-261-2.hum1 (aarch64, x86_64)\n  * systemd-standalone-tmpfiles-261-2.hum1 (aarch64, x86_64)\n  * systemd-sysusers-261-2.hum1 (aarch64, x86_64)\n  * systemd-tests-261-2.hum1 (aarch64, x86_64)\n  * systemd-udev-261-2.hum1 (aarch64, x86_64)\n  * systemd-ukify-261-2.hum1 (noarch)\n  * systemd-261-2.hum1.src (src)",
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  "vulnerabilities": [
    {
      "cve": "CVE-2024-5300",
      "cwe": {
        "id": "CWE-1220",
        "name": "Insufficient Granularity of Access Control"
      },
      "discovery_date": "2026-07-21T15:01:08.118092+00:00",
      "ids": [
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          "text": "2503660"
        }
      ],
      "notes": [
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          "category": "description",
          "text": "A flaw was found in Canonical snapd. The base AppArmor security profile configuration in snapd inadvertently allows strictly confined snap applications to bypass intended sandbox restrictions. This enables a compromised or malicious snap application, when running as root, to access sensitive system password hashes from the systemd-userdbd service, leading to information disclosure. This issue is mitigated on systems where the systemd-userdbd service is not installed by default.",
          "title": "Vulnerability description"
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        {
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          "text": "snapd: systemd: Canonical snapd: Information disclosure of system password hashes via AppArmor bypass",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat does not ship the Canonical snapd package. The vulnerability is in snapd\u0027s AppArmor security profile configuration, not in systemd itself. RHEL systems are not affected as they do not include snapd.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        }
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2503660"
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          "category": "external",
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        },
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        },
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        }
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      "release_date": "2026-07-21T14:00:51.066000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-24T11:58:08+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:systemd-main@aarch64",
            "Red Hat Hardened Images:systemd-main@noarch",
            "Red Hat Hardened Images:systemd-main@src",
            "Red Hat Hardened Images:systemd-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:29009"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:systemd-main@aarch64",
            "Red Hat Hardened Images:systemd-main@noarch",
            "Red Hat Hardened Images:systemd-main@src",
            "Red Hat Hardened Images:systemd-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "snapd: systemd: Canonical snapd: Information disclosure of system password hashes via AppArmor bypass"
    }
  ]
}

CVE-2024-5300 (GCVE-0-2024-5300)

Vulnerability from cvelistv5 – Published: 2026-07-21 14:00 – Updated: 2026-07-22 18:28

Title

AppArmor Base Profile Misconfiguration in snapd Permits Confined Snaps Unauthorized Access to Hashed Passwords via systemd-userdbd

Summary

An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/. On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.

Severity

5.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 18:13 UTC

CWE

CWE-212 - Improper removal of sensitive information before storage or transfer

Assigner

canonical mitre root

References

1 reference

URL	Tags
https://ubuntu.com/security/CVE-2024-5300	vdb-entryissue-tracking

Impacted products

7 products

Vendor	Product	Version
		Affected: 0 , < 2.76.1 (semver)
Canonical	Ubuntu 26.04 LTS	Unaffected: 2.76+ubuntu26.04.3 (dpkg)
Canonical	Ubuntu 24.04 LTS	Unaffected: 2.76+ubuntu24.04.1 (dpkg)
Canonical	Ubuntu 22.04 LTS	Unaffected: 2.76+ubuntu22.04.1 (dpkg)
Canonical	Ubuntu 20.04 LTS	Unaffected: 2.67.1+20.04ubuntu1~esm2 (dpkg)
Canonical	Ubuntu 18.04 LTS	Unaffected: 2.61.4ubuntu0.18.04.1+esm3 (dpkg)
Canonical	Ubuntu 16.04 LTS	Unaffected: 2.61.4ubuntu0.16.04.1+esm3

Date Public

2026-07-21 14:00

Credits

James Henstridge

Show details on NVD website

JSON

To clipboard

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              "status": "unaffected",
              "version": "2.61.4ubuntu0.18.04.1+esm3",
              "versionType": "dpkg"
            }
          ]
        },
        {
          "collectionURL": "https://launchpad.net/ubuntu/xenial",
          "defaultStatus": "affected",
          "packageName": "snapd",
          "platforms": [
            "Linux"
          ],
          "product": "Ubuntu 16.04 LTS",
          "repo": "https://launchpad.net/ubuntu/+source/snapd",
          "vendor": "Canonical",
          "versions": [
            {
              "status": "unaffected",
              "version": "2.61.4ubuntu0.16.04.1+esm3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "James Henstridge"
        }
      ],
      "datePublic": "2026-07-21T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/.\nOn systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application\u0027s sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns \"complete\" user records\u2014including sensitive hashed user passwords from /etc/shadow\u2014when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-212",
              "description": "CWE-212 Improper removal of sensitive information before storage or transfer",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-21T14:00:51.066Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "issue-tracking"
          ],
          "url": "https://ubuntu.com/security/CVE-2024-5300"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "AppArmor Base Profile Misconfiguration in snapd Permits Confined Snaps Unauthorized Access to Hashed Passwords via systemd-userdbd"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2024-5300",
    "datePublished": "2026-07-21T14:00:51.066Z",
    "dateReserved": "2024-05-23T21:58:22.809Z",
    "dateUpdated": "2026-07-22T18:28:16.818Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.