CVE-2021-41133 (GCVE-0-2021-41133)
Vulnerability from cvelistv5
Published
2021-10-08 00:00
Modified
2024-08-04 02:59
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-20 - Improper Input Validation
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
Impacted products
{
"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:*:*:*:*:*:*:*"
],
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},
{
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"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:*:*:*:*:*:*:*"
],
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"vendor": "fedoraproject",
"versions": [
{
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}
]
},
{
"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"
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"title": "CISA ADP Vulnrichment"
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},
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"url": "https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999"
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],
"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": [
{
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"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"
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"providerMetadata": {
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"discovery": "UNKNOWN"
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"dateUpdated": "2024-08-04T02:59:31.388Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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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