Vulnerability-Lookup

CNVD-2018-15165

Vulnerability from cnvd - Published: 2018-08-14

Title

Xen本地安全绕过漏洞（CNVD-2018-15165）

Description

Xen是一个开放源代码虚拟机监视器，由剑桥大学开发。它打算在单个计算机上运行多达102个满特征的操作系统。 Xen 4.7版本至4.10.x版本中存在本地安全绕过漏洞，该漏洞源于程序未能将只读旗标发送到qemu。当系统使用libxl或libxl-based工具栈时，攻击者可利用该漏洞绕过安全限制，执行未授权的操作。

Severity

中

Patch Name

Xen本地安全绕过漏洞（CNVD-2018-15165）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： http://xenbits.xen.org/xsa/advisory-266.html

Reference

https://securitytracker.com/id/1041203 https://nvd.nist.gov/vuln/detail/CVE-2018-12892

Impacted products

Name
Xen Xen >=4.7

Show details on source website

JSON

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-12892"
    }
  },
  "description": "Xen\u662f\u4e00\u4e2a\u5f00\u653e\u6e90\u4ee3\u7801\u865a\u62df\u673a\u76d1\u89c6\u5668\uff0c\u7531\u5251\u6865\u5927\u5b66\u5f00\u53d1\u3002\u5b83\u6253\u7b97\u5728\u5355\u4e2a\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c\u591a\u8fbe102\u4e2a\u6ee1\u7279\u5f81\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nXen 4.7\u7248\u672c\u81f34.10.x\u7248\u672c\u4e2d\u5b58\u5728\u672c\u5730\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5c06\u53ea\u8bfb\u65d7\u6807\u53d1\u9001\u5230qemu\u3002\u5f53\u7cfb\u7edf\u4f7f\u7528libxl\u6216libxl-based\u5de5\u5177\u6808\u65f6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u9650\u5236\uff0c\u6267\u884c\u672a\u6388\u6743\u7684\u64cd\u4f5c\u3002",
  "discovererName": "Andrew Reimers of OrionVM",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttp://xenbits.xen.org/xsa/advisory-266.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-15165",
  "openTime": "2018-08-14",
  "patchDescription": "Xen\u662f\u4e00\u4e2a\u5f00\u653e\u6e90\u4ee3\u7801\u865a\u62df\u673a\u76d1\u89c6\u5668\uff0c\u7531\u5251\u6865\u5927\u5b66\u5f00\u53d1\u3002\u5b83\u6253\u7b97\u5728\u5355\u4e2a\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c\u591a\u8fbe102\u4e2a\u6ee1\u7279\u5f81\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nXen 4.7\u7248\u672c\u81f34.10.x\u7248\u672c\u4e2d\u5b58\u5728\u672c\u5730\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5c06\u53ea\u8bfb\u65d7\u6807\u53d1\u9001\u5230qemu\u3002\u5f53\u7cfb\u7edf\u4f7f\u7528libxl\u6216libxl-based\u5de5\u5177\u6808\u65f6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u9650\u5236\uff0c\u6267\u884c\u672a\u6388\u6743\u7684\u64cd\u4f5c\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": "Xen\u672c\u5730\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff08CNVD-2018-15165\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Xen Xen \u003e=4.7"
  },
  "referenceLink": "https://securitytracker.com/id/1041203\r\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-12892",
  "serverity": "\u4e2d",
  "submitTime": "2018-06-29",
  "title": "Xen\u672c\u5730\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff08CNVD-2018-15165\uff09"
}

CVE-2018-12892 (GCVE-0-2018-12892)

Vulnerability from cvelistv5 – Published: 2018-07-02 17:00 – Updated: 2024-08-05 08:45

Summary

An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or (in some situations) users may be able to write to supposedly read-only disk images. Only emulated SCSI disks (specified as "sd" in the libxl disk configuration, or an equivalent) are affected. IDE disks ("hd") are not affected (because attempts to make them readonly are rejected). Additionally, CDROM devices (that is, devices specified to be presented to the guest as CDROMs, regardless of the nature of the backing storage on the host) are not affected; they are always read only. Only systems using qemu-xen (rather than qemu-xen-traditional) as the device model version are vulnerable. Only systems using libxl or libxl-based toolstacks are vulnerable. (This includes xl, and libvirt with the libxl driver.) The vulnerability is present in Xen versions 4.7 and later. (In earlier versions, provided that the patch for XSA-142 has been applied, attempts to create read only disks are rejected.) If the host and guest together usually support PVHVM, the issue is exploitable only if the malicious guest administrator has control of the guest kernel or guest kernel command line.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://www.debian.org/security/2018/dsa-4236	vendor-advisoryx_refsource_DEBIAN
https://security.gentoo.org/glsa/201810-06	vendor-advisoryx_refsource_GENTOO
http://www.securityfocus.com/bid/104571	vdb-entryx_refsource_BID
http://xenbits.xen.org/xsa/advisory-266.html	x_refsource_CONFIRM
http://www.securitytracker.com/id/1041203	vdb-entryx_refsource_SECTRACK
http://www.openwall.com/lists/oss-security/2018/0…	mailing-listx_refsource_MLIST

Date Public

2018-06-27 00:00

Show details on NVD website

JSON

To clipboard

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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CNVD-2018-15165

CVE-2018-12892 (GCVE-0-2018-12892)

Tags

Sightings

Nomenclature

Related by attack behaviour