Vulnerability-Lookup

CNVD-2021-03259

Vulnerability from cnvd - Published: 2021-01-15

Title

QEMU拒绝服务漏洞（CNVD-2021-03259）

Description

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人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 4.1.0 存在安全漏洞，该漏洞源于ATI VGA实现中发现了一个越界读取缺陷。当通过ati mm write()回调处理MMIO写操作时，它发生在ati游标定义()例程中。恶意客户机可能会滥用此缺陷使QEMU进程崩溃，从而导致拒绝服务。目前没有详细的漏洞细节提供。

Severity

低

Patch Name

QEMU拒绝服务漏洞（CNVD-2021-03259）的补丁

Patch Description

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://git.qemu.org/?p=qemu.git;a=commit;h=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1841136

Impacted products

Name
Qemu QEMU 4.1.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-20808",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-20808"
    }
  },
  "description": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u4e2a\u4eba\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 4.1.0 \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eATI VGA\u5b9e\u73b0\u4e2d\u53d1\u73b0\u4e86\u4e00\u4e2a\u8d8a\u754c\u8bfb\u53d6\u7f3a\u9677\u3002\u5f53\u901a\u8fc7ati mm write()\u56de\u8c03\u5904\u7406MMIO\u5199\u64cd\u4f5c\u65f6\uff0c\u5b83\u53d1\u751f\u5728ati\u6e38\u6807\u5b9a\u4e49()\u4f8b\u7a0b\u4e2d\u3002\u6076\u610f\u5ba2\u6237\u673a\u53ef\u80fd\u4f1a\u6ee5\u7528\u6b64\u7f3a\u9677\u4f7fQEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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://git.qemu.org/?p=qemu.git;a=commit;h=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-03259",
  "openTime": "2021-01-15",
  "patchDescription": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u4e2a\u4eba\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 4.1.0 \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eATI VGA\u5b9e\u73b0\u4e2d\u53d1\u73b0\u4e86\u4e00\u4e2a\u8d8a\u754c\u8bfb\u53d6\u7f3a\u9677\u3002\u5f53\u901a\u8fc7ati mm write()\u56de\u8c03\u5904\u7406MMIO\u5199\u64cd\u4f5c\u65f6\uff0c\u5b83\u53d1\u751f\u5728ati\u6e38\u6807\u5b9a\u4e49()\u4f8b\u7a0b\u4e2d\u3002\u6076\u610f\u5ba2\u6237\u673a\u53ef\u80fd\u4f1a\u6ee5\u7528\u6b64\u7f3a\u9677\u4f7fQEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-03259\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Qemu QEMU 4.1.0"
  },
  "referenceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=1841136",
  "serverity": "\u4f4e",
  "submitTime": "2021-01-06",
  "title": "QEMU\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-03259\uff09"
}

CVE-2019-20808 (GCVE-0-2019-20808)

Vulnerability from cvelistv5 – Published: 2020-12-31 00:26 – Updated: 2024-08-05 02:53

Summary

In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=a…	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=1841136	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021020…	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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            "url": "https://security.netapp.com/advisory/ntap-20210205-0003/"
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        ],
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    ],
    "cna": {
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        }
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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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Action not permitted

CNVD-2021-03259

CVE-2019-20808 (GCVE-0-2019-20808)

Tags

Sightings

Nomenclature

Related by attack behaviour