Vulnerability-Lookup

WID-SEC-W-2022-1447

Vulnerability from csaf_certbund - Published: 2022-05-10 22:00 - Updated: 2024-06-30 22:00

Summary

Red Hat Enterprise Linux (flatpak): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Hoch

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux in flatpak ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2021-43860

Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Der Fehler besteht aufgrund einer fehlerhaften Autorisierung in der flatpak-Komponente, die dazu führen kann, dass Anwendungen sich selbst Berechtigungen ohne die Zustimmung des Benutzers erteilen können. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsmaßnahmen zu umgehen. Zur erfolgreichen Ausnutzung ist eine Benutzeraktion erforderlich.

Affected products

Known affected 4 products

Product	Identifier	Version
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—
Amazon Linux 2 Amazon	`cpe:/o:amazon:linux_2:-`	—
Gentoo Linux Gentoo	`cpe:/o:gentoo:linux:-`	—
Red Hat Enterprise Linux 8 Red Hat / Enterprise Linux	`cpe:/o:redhat:enterprise_linux:8`	8

References

6 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://access.redhat.com/errata/RHSA-2022:1792	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://security.gentoo.org/glsa/202312-12	external
https://alas.aws.amazon.com/AL2/ALAS-2024-2518.html	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
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      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
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        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux in flatpak ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
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    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2022-1447 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-1447.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-1447 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-1447"
      },
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        "category": "external",
        "summary": "Red Hat Security Advisory vom 2022-05-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:1792"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:3284-1 vom 2022-09-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-September/012249.html"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202312-12 vom 2023-12-24",
        "url": "https://security.gentoo.org/glsa/202312-12"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2024-2518 vom 2024-06-28",
        "url": "https://alas.aws.amazon.com/AL2/ALAS-2024-2518.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Red Hat Enterprise Linux (flatpak): Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
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        {
          "date": "2023-12-26T23:00:00.000+00:00",
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          "summary": "Neue Updates von Gentoo aufgenommen"
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        {
          "date": "2024-06-30T22:00:00.000+00:00",
          "number": "4",
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                  "product_id": "T014111",
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                    "cpe": "cpe:/o:redhat:enterprise_linux:8"
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            "name": "SUSE Linux",
            "product": {
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      "notes": [
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          "category": "description",
          "text": "Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Der Fehler besteht aufgrund einer fehlerhaften Autorisierung in der flatpak-Komponente, die dazu f\u00fchren kann, dass Anwendungen sich selbst Berechtigungen ohne die Zustimmung des Benutzers erteilen k\u00f6nnen. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen. Zur erfolgreichen Ausnutzung ist eine Benutzeraktion erforderlich."
        }
      ],
      "product_status": {
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          "398363",
          "T012167",
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      },
      "release_date": "2022-05-10T22:00:00.000+00:00",
      "title": "CVE-2021-43860"
    }
  ]
}

CVE-2021-43860 (GCVE-0-2021-43860)

Vulnerability from cvelistv5 – Published: 2022-01-12 00:00 – Updated: 2024-08-04 04:10

Title

Permissions granted to applications can be hidden from the user at install time

Summary

Flatpak is a Linux application sandboxing and distribution framework. Prior to versions 1.12.3 and 1.10.6, Flatpak doesn't properly validate that the permissions displayed to the user for an app at install time match the actual permissions granted to the app at runtime, in the case that there's a null byte in the metadata file of an app. Therefore apps can grant themselves permissions without the consent of the user. Flatpak shows permissions to the user during install by reading them from the "xa.metadata" key in the commit metadata. This cannot contain a null terminator, because it is an untrusted GVariant. Flatpak compares these permissions to the *actual* metadata, from the "metadata" file to ensure it wasn't lied to. However, the actual metadata contents are loaded in several places where they are read as simple C-style strings. That means that, if the metadata file includes a null terminator, only the content of the file from *before* the terminator gets compared to xa.metadata. Thus, any permissions that appear in the metadata file after a null terminator are applied at runtime but not shown to the user. So maliciously crafted apps can give themselves hidden permissions. Users who have Flatpaks installed from untrusted sources are at risk in case the Flatpak has a maliciously crafted metadata file, either initially or in an update. This issue is patched in versions 1.12.3 and 1.10.6. As a workaround, users can manually check the permissions of installed apps by checking the metadata file or the xa.metadata key on the commit metadata.

Severity

8.2 (High)


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

CWE

CWE-269 - Improper Privilege Management

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7978 records in the last 180 days details

References

11 references

URL	Tags
https://github.com/flatpak/flatpak/security/advis…
https://github.com/flatpak/flatpak/commit/54ec1a4…
https://github.com/flatpak/flatpak/commit/65cbfac…
https://github.com/flatpak/flatpak/commit/93357d3…
https://github.com/flatpak/flatpak/commit/ba818f5…
https://github.com/flatpak/flatpak/commit/d9a8f9d…
https://github.com/flatpak/flatpak/releases/tag/1.10.6
https://github.com/flatpak/flatpak/releases/tag/1.12.3
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.debian.org/security/2022/dsa-5049	vendor-advisory
https://security.gentoo.org/glsa/202312-12	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
flatpak	flatpak	Affected: >= 1.11.0, < 1.12.3 Affected: < 1.10.6

Show details on NVD website

JSON

To clipboard

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            }
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      ],
      "metrics": [
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
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          "url": "https://github.com/flatpak/flatpak/releases/tag/1.10.6"
        },
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        },
        {
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          "tags": [
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    "state": "PUBLISHED"
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}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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

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