Vulnerability-Lookup

CNVD-2021-03542

Vulnerability from cnvd - Published: 2021-01-17

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

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-21261",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-21261"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-03542",
  "openTime": "2021-01-17",
  "patchDescription": "Flatpak\u662f\u4e00\u5957\u7528\u4e8eLinux\u684c\u9762\u5e94\u7528\u8ba1\u7b97\u673a\u73af\u5883\u7684\u5e94\u7528\u7a0b\u5e8f\u865a\u62df\u5316\u7cfb\u7edf\u3002\r\n\r\nFlatpak\u5b58\u5728\u6ce8\u5165\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eflatpak-portal\u5141\u8bb8\u6c99\u7bb1\u5e94\u7528\u7a0b\u5e8f\u5728\u4e3b\u673a\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801(\u6c99\u7bb1\u9003\u8131)\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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  "products": {
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-21261",
  "serverity": "\u4e2d",
  "submitTime": "2021-01-16",
  "title": "Flatpak\u6ce8\u5165\u6f0f\u6d1e"
}

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

Vulnerability from cvelistv5 – Published: 2021-01-14 19:40 – Updated: 2024-08-03 18:09

Title

Flatpak sandbox escape via spawn portal

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.

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')

Assigner

GitHub_M mitre root

References

8 references

URL	Tags
https://github.com/flatpak/flatpak/security/advis…	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-advisoryx_refsource_DEBIAN
https://github.com/flatpak/flatpak/commit/6d1773d…	x_refsource_MISC
https://github.com/flatpak/flatpak/commit/6e5ae7a…	x_refsource_MISC
https://github.com/flatpak/flatpak/commit/aeb6a7a…	x_refsource_MISC
https://github.com/flatpak/flatpak/commit/cc14010…	x_refsource_MISC
https://security.gentoo.org/glsa/202101-21	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

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

Show details on NVD website

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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.