Vulnerability-Lookup

RHSA-2021:4044

Vulnerability from csaf_opensuse - Published: 2021-11-01 00:00 - Updated: 2026-09-20 11:16

Summary

security update for flatpak

Severity

Important

Notes

Title of the patch: security update for flatpak

Description of the patch: This security update provides a functional equivalent of RHSA-2021:4044. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2021:4044.

Patchnames: RHSA-2021:4044

CVE-2021-41133

8.8 (High)


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

Affected products

Recommended 8 products

Product	Version	Remediation
Unresolved product id: SUSE Liberty Linux 7 LTSS:flatpak-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7 LTSS:flatpak-builder-0:1.0.0-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7 LTSS:flatpak-devel-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7 LTSS:flatpak-libs-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7:flatpak-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7:flatpak-builder-0:1.0.0-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7:flatpak-devel-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 7:flatpak-libs-0:1.0.9-12.el7_9.x86_64	—	Vendor Fix

Threats

Impact important

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/r…	self
https://www.suse.com/security/cve/CVE-2021-41133/	self
https://www.suse.com/security/cve/CVE-2021-41133	external
https://bugzilla.suse.com/1191507	external
https://bugzilla.suse.com/1191937	external

JSON

To clipboard

{
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      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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        "text": "This security update provides a functional equivalent of RHSA-2021:4044.\nThe original Red Hat(R) advisory is available from the Red Hat web site at\nhttps://access.redhat.com/errata/RHSA-2021:4044.\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "RHSA-2021:4044",
        "title": "Patchnames"
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        "product_reference": "flatpak-0:1.0.9-12.el7_9.x86_64",
        "relates_to_product_reference": "SUSE Liberty Linux 7"
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      {
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        "product_reference": "flatpak-builder-0:1.0.0-12.el7_9.x86_64",
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        },
        "product_reference": "flatpak-0:1.0.9-12.el7_9.x86_64",
        "relates_to_product_reference": "SUSE Liberty Linux 7 LTSS"
      },
      {
        "category": "default_component_of",
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        },
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        },
        "product_reference": "flatpak-devel-0:1.0.9-12.el7_9.x86_64",
        "relates_to_product_reference": "SUSE Liberty Linux 7 LTSS"
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        "relates_to_product_reference": "SUSE Liberty Linux 7 LTSS"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-41133",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2021-41133"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak\u0027s denylist seccomp filter, in order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Liberty Linux 7 LTSS:flatpak-0:1.0.9-12.el7_9.x86_64",
          "SUSE Liberty Linux 7 LTSS:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
          "SUSE Liberty Linux 7 LTSS:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
          "SUSE Liberty Linux 7 LTSS:flatpak-libs-0:1.0.9-12.el7_9.x86_64",
          "SUSE Liberty Linux 7:flatpak-0:1.0.9-12.el7_9.x86_64",
          "SUSE Liberty Linux 7:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
          "SUSE Liberty Linux 7:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
          "SUSE Liberty Linux 7:flatpak-libs-0:1.0.9-12.el7_9.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2021-41133",
          "url": "https://www.suse.com/security/cve/CVE-2021-41133"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1191507 for CVE-2021-41133",
          "url": "https://bugzilla.suse.com/1191507"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1191937 for CVE-2021-41133",
          "url": "https://bugzilla.suse.com/1191937"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Liberty Linux 7 LTSS:flatpak-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-libs-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-libs-0:1.0.9-12.el7_9.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Liberty Linux 7 LTSS:flatpak-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7 LTSS:flatpak-libs-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-builder-0:1.0.0-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-devel-0:1.0.9-12.el7_9.x86_64",
            "SUSE Liberty Linux 7:flatpak-libs-0:1.0.9-12.el7_9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-11-01T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2021-41133"
    }
  ]
}

CVE-2021-41133 (GCVE-0-2021-41133)

Vulnerability from cvelistv5 – Published: 2021-10-08 00:00 – Updated: 2024-08-04 02:59

Title

Sandbox bypass via recent VFS-manipulating syscalls

Summary

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter, in order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-30 16:07 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

GitHub_M mitre root

References

14 references

URL	Tags
https://github.com/flatpak/flatpak/security/advis…
https://github.com/flatpak/flatpak/commit/1330662…
https://github.com/flatpak/flatpak/commit/26b1248…
https://github.com/flatpak/flatpak/commit/462fca2…
https://github.com/flatpak/flatpak/commit/4c34815…
https://github.com/flatpak/flatpak/commit/89ae9fe…
https://github.com/flatpak/flatpak/commit/9766ee0…
https://github.com/flatpak/flatpak/commit/a10f52a…
https://github.com/flatpak/flatpak/commit/e26ac75…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.debian.org/security/2021/dsa-4984	vendor-advisory
http://www.openwall.com/lists/oss-security/2021/10/26/9	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202312-12	vendor-advisory

Impacted products

5 products

Vendor	Product	Version
flatpak	flatpak	Affected: >= 1.8.0, <= 1.8.2 Affected: >= 1.10.0, < 1.10.4 Affected: >= 1.11.0, < 1.12.0
flatpak	flatpak	Affected: 1.10.0 , ≤ 1.10.4 (custom) Affected: 1.11.0 , < 1.12.0 (custom) Affected: 1.8.0 , < 1.8.2 (custom) cpe:2.3:a:flatpak:flatpak:1.10.0:::::::* cpe:2.3:a:flatpak:flatpak:1.11.0:::::::* cpe:2.3:a:flatpak:flatpak:1.8.0:::::::*
fedoraproject	fedora	Affected: 34 cpe:2.3:o:fedoraproject:fedora:34:::::::*
fedoraproject	fedora	Affected: 33 cpe:2.3:o:fedoraproject:fedora:33:::::::*
debian	debian_linux	Affected: 11.0 cpe:2.3:o:debian:debian_linux:11.0:::::::*

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:flatpak:flatpak:1.10.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:flatpak:flatpak:1.11.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:flatpak:flatpak:1.8.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "flatpak",
            "vendor": "flatpak",
            "versions": [
              {
                "lessThanOrEqual": "1.10.4",
                "status": "affected",
                "version": "1.10.0",
                "versionType": "custom"
              },
              {
                "lessThan": "1.12.0",
                "status": "affected",
                "version": "1.11.0",
                "versionType": "custom"
              },
              {
                "lessThan": "1.8.2",
                "status": "affected",
                "version": "1.8.0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "fedora",
            "vendor": "fedoraproject",
            "versions": [
              {
                "status": "affected",
                "version": "34"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "fedora",
            "vendor": "fedoraproject",
            "versions": [
              {
                "status": "affected",
                "version": "33"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "debian_linux",
            "vendor": "debian",
            "versions": [
              {
                "status": "affected",
                "version": "11.0"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-41133",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-30T16:07:06.539565Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-30T16:14:27.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T02:59:31.388Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f"
          },
          {
            "tags": [
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            "url": "https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf"
          },
          {
            "name": "FEDORA-2021-4b201d15e6",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/"
          },
          {
            "name": "DSA-4984",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4984"
          },
          {
            "name": "[oss-security] 20211026 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/10/26/9"
          },
          {
            "name": "FEDORA-2021-c5a9c85737",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/"
          },
          {
            "name": "GLSA-202312-12",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202312-12"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "product": "flatpak",
          "vendor": "flatpak",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.8.0, \u003c= 1.8.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.10.0, \u003c 1.10.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.11.0, \u003c 1.12.0"
            }
          ]
        }
      ],
      "descriptions": [
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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        },
        {
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        },
        {
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        },
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        }
      ],
      "source": {
        "advisory": "GHSA-67h7-w3jq-vh4q",
        "discovery": "UNKNOWN"
      },
      "title": "Sandbox bypass via recent VFS-manipulating syscalls"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-41133",
    "datePublished": "2021-10-08T00:00:00.000Z",
    "dateReserved": "2021-09-15T00:00:00.000Z",
    "dateUpdated": "2024-08-04T02:59:31.388Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

RHSA-2021:4044

CVE-2021-41133 (GCVE-0-2021-41133)

Tags

Sightings

Nomenclature

Related by attack behaviour