{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "state": "PUBLISHED", "cveId": "CVE-2021-41133", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "dateUpdated": "2024-08-04T02:59:31.388Z", "dateReserved": "2021-09-15T00:00:00.000Z", "datePublished": "2021-10-08T00:00:00.000Z" }, "containers": { "cna": { "title": "Sandbox bypass via recent VFS-manipulating syscalls", "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-12-23T10:06:26.199Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "affected": [ { "vendor": "flatpak", "product": "flatpak", "versions": [ { "version": ">= 1.8.0, <= 1.8.2", "status": "affected" }, { "version": ">= 1.10.0, < 1.10.4", "status": "affected" }, { "version": ">= 1.11.0, < 1.12.0", "status": "affected" } ] } ], "references": [ { "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q" }, { "url": "https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999" }, { "url": "https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca" }, { "url": "https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf" }, { "url": "https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36" }, { "url": "https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48" }, { "url": "https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f" }, { "url": "https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330" }, { "url": "https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf" }, { "name": "FEDORA-2021-4b201d15e6", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/" }, { "name": "DSA-4984", "tags": [ "vendor-advisory" ], "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" ], "url": "http://www.openwall.com/lists/oss-security/2021/10/26/9" }, { "name": "FEDORA-2021-c5a9c85737", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/" }, { "name": "GLSA-202312-12", "tags": [ "vendor-advisory" ], "url": "https://security.gentoo.org/glsa/202312-12" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH" } } ], "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-20: Improper Input Validation", "cweId": "CWE-20" } ] } ], "source": { "advisory": "GHSA-67h7-w3jq-vh4q", "discovery": "UNKNOWN" } }, "adp": [ { "affected": [ { "vendor": "flatpak", "product": "flatpak", "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", "versions": [ { "version": "1.10.0", "status": "affected", "lessThanOrEqual": "1.10.4", "versionType": "custom" }, { "version": "1.11.0", "status": "affected", "lessThan": "1.12.0", "versionType": "custom" }, { "version": "1.8.0", "status": "affected", "lessThan": "1.8.2", "versionType": "custom" } ] }, { "vendor": "fedoraproject", "product": "fedora", "cpes": [ "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "34", "status": "affected" } ] }, { "vendor": "fedoraproject", "product": "fedora", "cpes": [ "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "33", "status": "affected" } ] }, { "vendor": "debian", "product": "debian_linux", "cpes": [ "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "11.0", "status": "affected" } ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-30T16:07:06.539565Z", "id": "CVE-2021-41133", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-30T16:14:27.263Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T02:59:31.388Z" }, "title": "CVE Program Container", "references": [ { "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": 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"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" } ] } ] } }