csaf_redhat - rhsa-2021

rhsa-2021_4107

Vulnerability from csaf_redhat

Published

2021-11-02 20:14

Modified

2024-11-22 17:45

Summary

Red Hat Security Advisory: flatpak security update

Notes

Topic

An update for flatpak is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Security Fix(es): * flatpak: Sandbox bypass via recent VFS-manipulating syscalls (CVE-2021-41133) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

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        "text": "An update for flatpak is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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        "title": "Details"
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        "text": "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.",
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          "category": "general",
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        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "flatpak: Sandbox bypass via recent VFS-manipulating syscalls"
    }
  ]
}

cve-2021-41133

Vulnerability from cvelistv5

Published

2021-10-08 00:00

Modified

2024-08-04 02:59

Severity ?

8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

References

▼	URL	Tags
	https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
	https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999
	https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca
	https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf
	https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36
	https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48
	https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f
	https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330
	https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/	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/package-announce%40lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/	vendor-advisory
	https://security.gentoo.org/glsa/202312-12	vendor-advisory

Impacted products

Vendor

Product

Version

▼

flatpak

Version: >= 1.8.0, <= 1.8.2
Version: >= 1.10.0, < 1.10.4
Version: >= 1.11.0, < 1.12.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "affected": [
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            "cpes": [
              "cpe:2.3:a:flatpak:flatpak:1.10.0:*:*:*:*:*:*:*",
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              "cpe:2.3:a:flatpak:flatpak:1.8.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "flatpak",
            "vendor": "flatpak",
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              {
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                "version": "1.11.0",
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                "lessThan": "1.8.2",
                "status": "affected",
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          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "fedora",
            "vendor": "fedoraproject",
            "versions": [
              {
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                "version": "34"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
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            "defaultStatus": "unknown",
            "product": "fedora",
            "vendor": "fedoraproject",
            "versions": [
              {
                "status": "affected",
                "version": "33"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
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            "vendor": "debian",
            "versions": [
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              }
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        "metrics": [
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                "id": "CVE-2021-41133",
                "options": [
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                  },
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          "shortName": "CISA-ADP"
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        ],
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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",
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          }
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      "providerMetadata": {
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  "cveMetadata": {
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    "cveId": "CVE-2021-41133",
    "datePublished": "2021-10-08T00:00:00",
    "dateReserved": "2021-09-15T00:00:00",
    "dateUpdated": "2024-08-04T02:59:31.388Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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