Vulnerability-Lookup

CNVD-2021-12099

Vulnerability from cnvd - Published: 2021-02-24

Title

Firejail访问控制错误漏洞

Description

Firejail是一款使用C语言编写的SUID沙箱程序。 Firejail 0.9.64.4之前的版本存在访问控制错误漏洞，该漏洞源于在stat操作和OverlayFS mount操作之间存在toctou竞争条件，允许攻击者绕过预期的访问限制。

Severity

中

Patch Name

Firejail访问控制错误漏洞的补丁

Patch Description

Firejail是一款使用C语言编写的SUID沙箱程序。 Firejail 0.9.64.4之前的版本存在访问控制错误漏洞，该漏洞源于在stat操作和OverlayFS mount操作之间存在toctou竞争条件，允许攻击者绕过预期的访问限制。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接：https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b

Reference

https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt

Impacted products

Name
Firejail Firejail <0.9.64.4

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-26910",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26910"
    }
  },
  "description": "Firejail\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684SUID\u6c99\u7bb1\u7a0b\u5e8f\u3002\n\nFirejail 0.9.64.4\u4e4b\u524d\u7684\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728stat\u64cd\u4f5c\u548cOverlayFS mount\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728toctou\u7ade\u4e89\u6761\u4ef6\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u7ed5\u8fc7\u9884\u671f\u7684\u8bbf\u95ee\u9650\u5236\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1ahttps://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-12099",
  "openTime": "2021-02-24",
  "patchDescription": "Firejail\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684SUID\u6c99\u7bb1\u7a0b\u5e8f\u3002\r\n\r\nFirejail 0.9.64.4\u4e4b\u524d\u7684\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728stat\u64cd\u4f5c\u548cOverlayFS mount\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728toctou\u7ade\u4e89\u6761\u4ef6\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u7ed5\u8fc7\u9884\u671f\u7684\u8bbf\u95ee\u9650\u5236\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",
  "patchName": "Firejail\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Firejail Firejail \u003c0.9.64.4"
  },
  "referenceLink": "https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-23",
  "title": "Firejail\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-26910 (GCVE-0-2021-26910)

Vulnerability from cvelistv5 – Published: 2021-02-08 19:56 – Updated: 2024-08-03 20:33

Summary

Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

Severity

7.8 (High)


                        
                          CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:L/S:U/UI:N

CWE

Assigner

mitre mitre root

References

8 references

URL	Tags
https://github.com/netblue30/firejail/commit/97d8…	x_refsource_MISC
https://unparalleled.eu/publications/2021/advisor…	x_refsource_MISC
https://unparalleled.eu/blog/2021/20210208-rigged…	x_refsource_MISC
https://github.com/netblue30/firejail/releases/ta…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/02/09/1	mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4849	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202105-19	vendor-advisoryx_refsource_GENTOO

Show details on NVD website

JSON

To clipboard

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          },
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          },
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            "url": "https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/"
          },
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            "url": "https://github.com/netblue30/firejail/releases/tag/0.9.64.4"
          },
          {
            "name": "[oss-security] 20210209 Re: [cve-pending] Firejail: root privilege escalation in OverlayFS code",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/02/09/1"
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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.

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.
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CNVD-2021-12099

CVE-2021-26910 (GCVE-0-2021-26910)

Tags

Sightings

Nomenclature

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