cnvd - cnvd-2020-61976

cnvd-2020-61976

Vulnerability from cnvd

Title: QEMU代码问题漏洞（CNVD-2020-61976）

Description:

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）软件开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。

QEMU ide_cancel_dma_sync()存在安全漏洞，攻击者可利用该漏洞强制取消对NULL指针的引用，以触发主机系统上的拒绝服务。

Severity: 低

Patch Name: QEMU代码问题漏洞（CNVD-2020-61976）的补丁

Patch Description:

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）软件开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。

QEMU ide_cancel_dma_sync()存在安全漏洞，攻击者可利用该漏洞强制取消对NULL指针的引用，以触发主机系统上的拒绝服务。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://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01568.html

Reference: https://vigilance.fr/vulnerability/QEMU-NULL-pointer-dereference-via-ide-cancel-dma-sync-33449

Impacted products

Name
QEMU QEMU

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-25743"
    }
  },
  "description": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u5177\u6709\u901f\u5ea6\u5feb\u3001\u8de8\u5e73\u53f0\u7b49\u7279\u70b9\u3002\n\nQEMU ide_cancel_dma_sync()\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5f3a\u5236\u53d6\u6d88\u5bf9NULL\u6307\u9488\u7684\u5f15\u7528\uff0c\u4ee5\u89e6\u53d1\u4e3b\u673a\u7cfb\u7edf\u4e0a\u7684\u62d2\u7edd\u670d\u52a1\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\uff1a\r\nhttps://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01568.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-61976",
  "openTime": "2020-11-11",
  "patchDescription": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u5177\u6709\u901f\u5ea6\u5feb\u3001\u8de8\u5e73\u53f0\u7b49\u7279\u70b9\u3002\r\n\r\nQEMU ide_cancel_dma_sync()\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5f3a\u5236\u53d6\u6d88\u5bf9NULL\u6307\u9488\u7684\u5f15\u7528\uff0c\u4ee5\u89e6\u53d1\u4e3b\u673a\u7cfb\u7edf\u4e0a\u7684\u62d2\u7edd\u670d\u52a1\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": "QEMU\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2020-61976\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "QEMU QEMU"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/QEMU-NULL-pointer-dereference-via-ide-cancel-dma-sync-33449",
  "serverity": "\u4f4e",
  "submitTime": "2020-09-30",
  "title": "QEMU\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2020-61976\uff09"
}

CVE-2020-25743 (GCVE-0-2020-25743)

Vulnerability from cvelistv5

Published

2020-10-06 14:15

Modified

2024-08-04 15:40

Severity ?

CWE

Summary

hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.

References

▼	URL	Tags
	https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05967.html	x_refsource_MISC
	https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fide_nullptr1b	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2020/09/29/1	x_refsource_CONFIRM
	https://bugzilla.redhat.com/show_bug.cgi?id=1881409	x_refsource_MISC

Impacted products

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

Show details on NVD website

JSON

To clipboard

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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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