cnvd - cnvd-2019-40061

cnvd-2019-40061

Vulnerability from cnvd

Title: Xen PCI权限提升漏洞

Description:

Xen是一款开源的虚拟机监视器产品。

Xen PCI设备处理存在安全漏洞，攻击者可利用该漏洞允许本地PV guest提交特殊的请求，可提升权限。

Severity: 中

Patch Name: Xen PCI权限提升漏洞的补丁

Patch Description:

Xen是一款开源的虚拟机监视器产品。

Xen PCI设备处理存在安全漏洞，攻击者可利用该漏洞允许本地PV guest提交特殊的请求，可提升权限。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:

用户可参考如下厂商提供的安全补丁以修复该漏洞： http://xenbits.xen.org/xsa/advisory-302.html

Reference: http://xenbits.xen.org/xsa/advisory-302.html

Impacted products

Name
Xen Xen 4.12.*

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-18424",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-18424"
    }
  },
  "description": "Xen\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u865a\u62df\u673a\u76d1\u89c6\u5668\u4ea7\u54c1\u3002\n\nXen PCI\u8bbe\u5907\u5904\u7406\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5141\u8bb8\u672c\u5730PV guest\u63d0\u4ea4\u7279\u6b8a\u7684\u8bf7\u6c42\uff0c\u53ef\u63d0\u5347\u6743\u9650\u3002",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttp://xenbits.xen.org/xsa/advisory-302.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-40061",
  "openTime": "2019-11-11",
  "patchDescription": "Xen\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u865a\u62df\u673a\u76d1\u89c6\u5668\u4ea7\u54c1\u3002\r\n\r\nXen PCI\u8bbe\u5907\u5904\u7406\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5141\u8bb8\u672c\u5730PV guest\u63d0\u4ea4\u7279\u6b8a\u7684\u8bf7\u6c42\uff0c\u53ef\u63d0\u5347\u6743\u9650\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 PCI\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Xen Xen 4.12.*"
  },
  "referenceLink": "http://xenbits.xen.org/xsa/advisory-302.html",
  "serverity": "\u4e2d",
  "submitTime": "2019-11-04",
  "title": "Xen PCI\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2019-18424 (GCVE-0-2019-18424)

Vulnerability from cvelistv5

Published

2019-10-31 13:38

Modified

2024-08-05 01:54

Severity ?

CWE

Summary

An issue was discovered in Xen through 4.12.x allowing attackers to gain host OS privileges via DMA in a situation where an untrusted domain has access to a physical device. This occurs because passed through PCI devices may corrupt host memory after deassignment. When a PCI device is assigned to an untrusted domain, it is possible for that domain to program the device to DMA to an arbitrary address. The IOMMU is used to protect the host from malicious DMA by making sure that the device addresses can only target memory assigned to the guest. However, when the guest domain is torn down, or the device is deassigned, the device is assigned back to dom0, thus allowing any in-flight DMA to potentially target critical host data. An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. Only systems where guests are given direct access to physical devices capable of DMA (PCI pass-through) are vulnerable. Systems which do not use PCI pass-through are not vulnerable.

References

▼	URL	Tags
	http://xenbits.xen.org/xsa/advisory-302.html	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2019/10/31/6	mailing-list, x_refsource_MLIST
	http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00037.html	vendor-advisory, x_refsource_SUSE
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2BQKX7M2RHCWDBKNPX4KEBI3MJIH6AYZ/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I5WWPW4BSZDDW7VHU427XTVXV7ROOFFW/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZYATWNUGHRBG6I3TC24YHP5Y3J7I6KH/	vendor-advisory, x_refsource_FEDORA
	https://www.debian.org/security/2020/dsa-4602	vendor-advisory, x_refsource_DEBIAN
	https://seclists.org/bugtraq/2020/Jan/21	mailing-list, x_refsource_BUGTRAQ
	https://security.gentoo.org/glsa/202003-56	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

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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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