cnvd - cnvd-2019-47013

CNVD-2019-47013

Vulnerability from cnvd - Published: 2019-12-26

Title

Linux kernel KVM hypervisor内存错误引用漏洞

Description

Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。KVM hypervisor是其中的一个基于内核的虚拟机。 Linux kernel中的KVM hypervisor存在内存错误引用漏洞。攻击者可利用该漏洞造成拒绝服务（主机内核崩溃）或获取权限。

Severity

高

Patch Name

Linux kernel KVM hypervisor内存错误引用漏洞的补丁

Patch Description

Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。KVM hypervisor是其中的一个基于内核的虚拟机。 Linux kernel中的KVM hypervisor存在内存错误引用漏洞。攻击者可利用该漏洞造成拒绝服务（主机内核崩溃）或获取权限。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

https://www.linux-kvm.org/page/Main_Page

Reference

https://vigilance.fr/vulnerability/Linux-kernel-use-after-free-via-nested-get-vmcs12-pages-28048

Impacted products

Name
['Linux Linux kernel <4.14.91', 'Linux Linux kernel <4.19.13']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-16882"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM hypervisor\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002\n\nLinux kernel\u4e2d\u7684KVM hypervisor\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u4e3b\u673a\u5185\u6838\u5d29\u6e83\uff09\u6216\u83b7\u53d6\u6743\u9650\u3002",
  "formalWay": "https://www.linux-kvm.org/page/Main_Page",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-47013",
  "openTime": "2019-12-26",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM hypervisor\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002\r\n\r\nLinux kernel\u4e2d\u7684KVM hypervisor\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u4e3b\u673a\u5185\u6838\u5d29\u6e83\uff09\u6216\u83b7\u53d6\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": "Linux kernel KVM hypervisor\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Linux Linux kernel \u003c4.14.91",
      "Linux Linux kernel \u003c4.19.13"
    ]
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Linux-kernel-use-after-free-via-nested-get-vmcs12-pages-28048",
  "serverity": "\u9ad8",
  "submitTime": "2018-12-21",
  "title": "Linux kernel KVM hypervisor\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e"
}

CVE-2018-16882 (GCVE-0-2018-16882)

Vulnerability from cvelistv5 – Published: 2019-01-03 16:00 – Updated: 2024-08-05 10:32

Summary

A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.

Severity ?

6.1 (Medium)


                        
                          CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H

CWE

CWE-416

Assigner

redhat

References

URL

Tags

	https://marc.info/?l=kvm&m=154514994222809&w=2	x_refsource_MISC
	https://usn.ubuntu.com/3872-1/	vendor-advisoryx_refsource_UBUNTU
	https://usn.ubuntu.com/3878-1/	vendor-advisoryx_refsource_UBUNTU
	https://usn.ubuntu.com/3871-5/	vendor-advisoryx_refsource_UBUNTU
	https://usn.ubuntu.com/3878-2/	vendor-advisoryx_refsource_UBUNTU
	https://usn.ubuntu.com/3871-4/	vendor-advisoryx_refsource_UBUNTU
	http://www.securityfocus.com/bid/106254	vdb-entryx_refsource_BID
	https://lwn.net/Articles/775720/	x_refsource_CONFIRM
	https://usn.ubuntu.com/3871-1/	vendor-advisoryx_refsource_UBUNTU
	https://lwn.net/Articles/775721/	x_refsource_CONFIRM
	https://usn.ubuntu.com/3871-3/	vendor-advisoryx_refsource_UBUNTU
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
	https://support.f5.com/csp/article/K80557033	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	The Linux Foundation	kernel:	Affected: before 4.14.91 Affected: before 4.19.13

Show details on NVD website

JSON

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            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CNVD-2019-47013

CVE-2018-16882 (GCVE-0-2018-16882)

Tags

Sightings

Nomenclature