jvndb - jvndb-2021-001756

jvndb-2021-001756

Vulnerability from jvndb

Published

2021-06-08 12:21

Modified

2021-06-08 12:21

Severity ?

5.3 (Medium) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

urllib3 vulnerable to Regular expression Denial-of-Service (ReDoS)

Details

urllib3 contains a Regular expression Denial-of-Service (DoS) vulnerability. urllib3, an HTTP client module for Python, contains a Regular expression Denial-of-Service (ReDoS) vulnerability (CWE-400, CVE-2021-33503) due to catastrophic backtracking while processing a malicious URL. Nariyoshi Chida of NTT Secure Platform Laboratories reported this vulnerability to urllib3 community and coordinated. JPCERT/CC published this advisory in order to notify users of this vulnerability.

References

▼	Type	URL
	JVN	https://jvn.jp/en/vu/JVNVU92413403/
	CVE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503
	NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-33503
	Uncontrolled Resource Consumption ('Resource Exhaustion')(CWE-400)	https://cwe.mitre.org/data/definitions/400.html

Impacted products

▼	Vendor	Product
	Python Software Foundation	urllib3

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-001756.html",
  "dc:date": "2021-06-08T12:21+09:00",
  "dcterms:issued": "2021-06-08T12:21+09:00",
  "dcterms:modified": "2021-06-08T12:21+09:00",
  "description": "urllib3 contains a Regular expression Denial-of-Service (DoS) vulnerability.\r\n\r\nurllib3, an HTTP client module for Python, contains a Regular expression Denial-of-Service (ReDoS) vulnerability (CWE-400, CVE-2021-33503) due to catastrophic backtracking while processing a malicious URL.\r\n\r\nNariyoshi Chida of NTT Secure Platform Laboratories reported this vulnerability to urllib3 community and coordinated. JPCERT/CC published this advisory in order to notify users of this vulnerability.",
  "link": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-001756.html",
  "sec:cpe": {
    "#text": "cpe:/a:python:urllib3",
    "@product": "urllib3",
    "@vendor": "Python Software Foundation",
    "@version": "2.2"
  },
  "sec:cvss": [
    {
      "@score": "5.0",
      "@severity": "Medium",
      "@type": "Base",
      "@vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
      "@version": "2.0"
    },
    {
      "@score": "5.3",
      "@severity": "Medium",
      "@type": "Base",
      "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "@version": "3.0"
    }
  ],
  "sec:identifier": "JVNDB-2021-001756",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/vu/JVNVU92413403/",
      "@id": "JVNVU#92413403",
      "@source": "JVN"
    },
    {
      "#text": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503",
      "@id": "CVE-2021-33503",
      "@source": "CVE"
    },
    {
      "#text": "https://nvd.nist.gov/vuln/detail/CVE-2021-33503",
      "@id": "CVE-2021-33503",
      "@source": "NVD"
    },
    {
      "#text": "https://cwe.mitre.org/data/definitions/400.html",
      "@id": "CWE-400",
      "@title": "Uncontrolled Resource Consumption (\u0027Resource Exhaustion\u0027)(CWE-400)"
    }
  ],
  "title": "urllib3 vulnerable to Regular expression Denial-of-Service (ReDoS)"
}

cve-2021-33503

Vulnerability from cvelistv5

Published

2021-06-29 10:55

Modified

2024-08-03 23:50

Severity ?

Summary

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

References

▼	URL	Tags
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202107-36	vendor-advisory, x_refsource_GENTOO
	https://www.oracle.com/security-alerts/cpuoct2021.html	x_refsource_MISC
	https://github.com/advisories/GHSA-q2q7-5pp4-w6pg	x_refsource_CONFIRM
	https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec	x_refsource_CONFIRM

Impacted products

▼	Vendor	Product
	n/a	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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