cnvd - cnvd-2021-03542

cnvd-2021-03542

Vulnerability from cnvd

Title: Flatpak注入漏洞

Description:

Flatpak是一套用于Linux桌面应用计算机环境的应用程序虚拟化系统。

Flatpak存在注入漏洞，该漏洞源于flatpak-portal允许沙箱应用程序在主机系统上执行任意代码(沙箱逃脱)。目前没有详细的漏洞细节提供。

Severity: 中

Patch Name: Flatpak注入漏洞的补丁

Patch Description:

Flatpak是一套用于Linux桌面应用计算机环境的应用程序虚拟化系统。

Flatpak存在注入漏洞，该漏洞源于flatpak-portal允许沙箱应用程序在主机系统上执行任意代码(沙箱逃脱)。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/flatpak/flatpak/commit/fb1eaefbceeb73f02eb1bc85865d74a414faf8b8

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-21261

Impacted products

Name
Flatpak Flatpak

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-21261",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-21261"
    }
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  "title": "Flatpak\u6ce8\u5165\u6f0f\u6d1e"
}

CVE-2021-21261 (GCVE-0-2021-21261)

Vulnerability from cvelistv5

Published

2021-01-14 19:40

Modified

2024-08-03 18:09

Severity ?

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

CWE

CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Summary

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. A bug was discovered in the `flatpak-portal` service that can allow sandboxed applications to execute arbitrary code on the host system (a sandbox escape). This sandbox-escape bug is present in versions from 0.11.4 and before fixed versions 1.8.5 and 1.10.0. The Flatpak portal D-Bus service (`flatpak-portal`, also known by its D-Bus service name `org.freedesktop.portal.Flatpak`) allows apps in a Flatpak sandbox to launch their own subprocesses in a new sandbox instance, either with the same security settings as the caller or with more restrictive security settings. For example, this is used in Flatpak-packaged web browsers such as Chromium to launch subprocesses that will process untrusted web content, and give those subprocesses a more restrictive sandbox than the browser itself. In vulnerable versions, the Flatpak portal service passes caller-specified environment variables to non-sandboxed processes on the host system, and in particular to the `flatpak run` command that is used to launch the new sandbox instance. A malicious or compromised Flatpak app could set environment variables that are trusted by the `flatpak run` command, and use them to execute arbitrary code that is not in a sandbox. As a workaround, this vulnerability can be mitigated by preventing the `flatpak-portal` service from starting, but that mitigation will prevent many Flatpak apps from working correctly. This is fixed in versions 1.8.5 and 1.10.0.

References

▼	URL	Tags
	https://github.com/flatpak/flatpak/security/advisories/GHSA-4ppf-fxf6-vxg2	x_refsource_CONFIRM
	https://github.com/flatpak/flatpak/releases/tag/1.8.5	x_refsource_MISC
	https://www.debian.org/security/2021/dsa-4830	vendor-advisory, x_refsource_DEBIAN
	https://github.com/flatpak/flatpak/commit/6d1773d2a54dde9b099043f07a2094a4f1c2f486	x_refsource_MISC
	https://github.com/flatpak/flatpak/commit/6e5ae7a109cdfa9735ea7ccbd8cb79f9e8d3ae8b	x_refsource_MISC
	https://github.com/flatpak/flatpak/commit/aeb6a7ab0abaac4a8f4ad98b3df476d9de6b8bd4	x_refsource_MISC
	https://github.com/flatpak/flatpak/commit/cc1401043c075268ecc652eac557ef8076b5eaba	x_refsource_MISC
	https://security.gentoo.org/glsa/202101-21	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	flatpak	flatpak	Version: >= 0.11.4, < 1.8.5 Version: >= 1.9.0, < 1.10.0

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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.
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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