cnvd - cnvd-2021-22851

cnvd-2021-22851

Vulnerability from cnvd

Title: Pygments拒绝服务攻击漏洞

Description:

Pygments是一种通用语法高亮显示工具，适用于代码托管、论坛、维基或其他需要美化源代码的应用程序。

Pygments 1.5到2.7.3版本存在拒绝服务漏洞。漏洞产生的原因是Pygments中的SMLLexer中的无限循环。攻击者可以利用此漏洞导致在执行标准ML（SML）源文件的语法突出显示时拒绝服务。

Severity: 中

Formal description:

厂商未提供漏洞修复方案，请关注厂商主页更新： https://pygments.org/docs/

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-20270

Impacted products

Name
Pygments Pygments >=1.5，<=2.7.3

Show details on source website

JSON

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{
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    "cve": {
      "cveNumber": "CVE-2021-20270",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-20270"
    }
  },
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  "formalWay": "\u5382\u5546\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://pygments.org/docs/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-22851",
  "openTime": "2021-03-26",
  "products": {
    "product": "Pygments Pygments \u003e=1.5\uff0c\u003c=2.7.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-20270",
  "serverity": "\u4e2d",
  "submitTime": "2021-03-25",
  "title": "Pygments\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u6f0f\u6d1e"
}

CVE-2021-20270 (GCVE-0-2021-20270)

Vulnerability from cvelistv5

Published

2021-03-23 16:40

Modified

2024-08-03 17:37

Severity ?

CWE

CWE-835

Summary

An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1922136	x_refsource_MISC
	https://www.debian.org/security/2021/dsa-4889	vendor-advisory, x_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html	mailing-list, x_refsource_MLIST
	https://www.oracle.com/security-alerts/cpuoct2021.html	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	python-pygments	Version: python-pygments 2.7.4

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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