Vulnerability-Lookup

CNVD-2021-49613

Vulnerability from cnvd - Published: 2021-07-12

Title

Mozilla Firefox越界读取漏洞（CNVD-2021-49613）

Description

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox存在安全漏洞，该漏洞源于在禁用WebRender的情况下在canvas上绘制文本时存在边界条件。远程攻击者可以利用该漏洞触发越界读取错误并读取系统上的内存内容。

Severity

低

Patch Name

Mozilla Firefox越界读取漏洞（CNVD-2021-49613）的补丁

Patch Description

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox存在安全漏洞，该漏洞源于在禁用WebRender的情况下在canvas上绘制文本时存在边界条件。远程攻击者可以利用该漏洞触发越界读取错误并读取系统上的内存内容。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

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： https://www.mozilla.org/en-US/security/advisories/mfsa2021-27/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-29968

Impacted products

Name
Mozilla Firefox < 89.0.1

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2021-29968",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-29968"
    }
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  "description": "Mozilla Firefox\u662f\u7f8e\u56fdMozilla\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002\n\nMozilla Firefox\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u7981\u7528WebRender\u7684\u60c5\u51b5\u4e0b\u5728canvas\u4e0a\u7ed8\u5236\u6587\u672c\u65f6\u5b58\u5728\u8fb9\u754c\u6761\u4ef6\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u89e6\u53d1\u8d8a\u754c\u8bfb\u53d6\u9519\u8bef\u5e76\u8bfb\u53d6\u7cfb\u7edf\u4e0a\u7684\u5185\u5b58\u5185\u5bb9\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-27/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-49613",
  "openTime": "2021-07-12",
  "patchDescription": "Mozilla Firefox\u662f\u7f8e\u56fdMozilla\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002\r\n\r\nMozilla Firefox\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u7981\u7528WebRender\u7684\u60c5\u51b5\u4e0b\u5728canvas\u4e0a\u7ed8\u5236\u6587\u672c\u65f6\u5b58\u5728\u8fb9\u754c\u6761\u4ef6\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u89e6\u53d1\u8d8a\u754c\u8bfb\u53d6\u9519\u8bef\u5e76\u8bfb\u53d6\u7cfb\u7edf\u4e0a\u7684\u5185\u5b58\u5185\u5bb9\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": "Mozilla Firefox\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff08CNVD-2021-49613\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Mozilla Firefox \u003c 89.0.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-29968",
  "serverity": "\u4f4e",
  "submitTime": "2021-07-06",
  "title": "Mozilla Firefox\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff08CNVD-2021-49613\uff09"
}

CVE-2021-29968 (GCVE-0-2021-29968)

Vulnerability from cvelistv5 – Published: 2021-06-24 13:14 – Updated: 2024-08-03 22:24

Summary

When drawing text onto a canvas with WebRender disabled, an out of bounds read could occur. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.0.1.

Severity

No CVSS data available.

CWE

Out of bounds read when drawing text characters onto a Canvas

Assigner

mozilla mitre root

References

2 references

URL	Tags
https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1712047	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Mozilla	Firefox	Affected: unspecified , < 89.0.1 (custom)

Show details on NVD website

JSON

To clipboard

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        ],
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    ],
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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.