pysec - pysec-2021-108

pysec-2021-108

Vulnerability from pysec

Published

2021-06-29 11:15

Modified

2021-07-02 18:56

Details

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.

Impacted products

Name	purl
urllib3	pkg:pypi/urllib3

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "urllib3",
        "purl": "pkg:pypi/urllib3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2d4a3fee6de2fa45eb82169361918f759269b4ec"
            }
          ],
          "repo": "https://github.com/urllib3/urllib3",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.26.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2",
        "0.3",
        "0.3.1",
        "0.4.0",
        "0.4.1",
        "1.0",
        "1.0.1",
        "1.0.2",
        "1.1",
        "1.10",
        "1.10.1",
        "1.10.2",
        "1.10.3",
        "1.10.4",
        "1.11",
        "1.12",
        "1.13",
        "1.13.1",
        "1.14",
        "1.15",
        "1.15.1",
        "1.16",
        "1.17",
        "1.18",
        "1.18.1",
        "1.19",
        "1.19.1",
        "1.2",
        "1.2.1",
        "1.2.2",
        "1.20",
        "1.21",
        "1.21.1",
        "1.22",
        "1.23",
        "1.24",
        "1.24.1",
        "1.24.2",
        "1.24.3",
        "1.25",
        "1.25.1",
        "1.25.10",
        "1.25.11",
        "1.25.2",
        "1.25.3",
        "1.25.4",
        "1.25.5",
        "1.25.6",
        "1.25.7",
        "1.25.8",
        "1.25.9",
        "1.26.0",
        "1.26.1",
        "1.26.2",
        "1.26.3",
        "1.26.4",
        "1.3",
        "1.4",
        "1.5",
        "1.6",
        "1.7",
        "1.7.1",
        "1.8",
        "1.8.2",
        "1.8.3",
        "1.9",
        "1.9.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-33503",
    "GHSA-q2q7-5pp4-w6pg"
  ],
  "details": "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.",
  "id": "PYSEC-2021-108",
  "modified": "2021-07-02T18:56:20.858344Z",
  "published": "2021-06-29T11:15:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-q2q7-5pp4-w6pg"
    },
    {
      "type": "FIX",
      "url": "https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec"
    }
  ]
}

CVE-2021-33503 (GCVE-0-2021-33503)

Vulnerability from cvelistv5

Published

2021-06-29 10:55

Modified

2024-08-03 23:50

Severity ?

CWE

Summary

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	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
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ghsa-q2q7-5pp4-w6pg

Vulnerability from github

Published

2021-06-01 21:19

Modified

2024-11-18 22:43

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

Catastrophic backtracking in URL authority parser when passed URL containing many @ characters

Details

Impact

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.

Patches

The issue has been fixed in urllib3 v1.26.5.

References

For more information

If you have any questions or comments about this advisory: * Ask in our community Discord * Email sethmichaellarson@gmail.com

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "urllib3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.25.4"
            },
            {
              "fixed": "1.26.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-33503"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-28T22:09:12Z",
    "nvd_published_at": "2021-06-29T11:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWhen 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.\n\n\n### Patches\n\nThe issue has been fixed in urllib3 v1.26.5.\n\n### References\n\n- [CVE-2021-33503](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503)\n- [JVNVU#92413403 (English)](https://jvn.jp/en/vu/JVNVU92413403/)\n- [JVNVU#92413403 (Japanese)](https://jvn.jp/vu/JVNVU92413403/)\n- [urllib3 v1.26.5](https://github.com/urllib3/urllib3/releases/tag/1.26.5)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Ask in our [community Discord](https://discord.gg/urllib3)\n* Email [sethmichaellarson@gmail.com](mailto:sethmichaellarson@gmail.com)\n",
  "id": "GHSA-q2q7-5pp4-w6pg",
  "modified": "2024-11-18T22:43:15Z",
  "published": "2021-06-01T21:19:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/urllib3/urllib3/security/advisories/GHSA-q2q7-5pp4-w6pg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33503"
    },
    {
      "type": "WEB",
      "url": "https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec"
    },
    {
      "type": "WEB",
      "url": "https://github.com/urllib3/urllib3/commit/5b047b645f5f93900d5e2fc31230848c25eb1f5f#diff-52026d639119bf1e0364836b4e8a18bd9ed3c95c6ba39b26534a5057a65e35bbR65"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2021-108.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/urllib3/urllib3"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-36"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Catastrophic backtracking in URL authority parser when passed URL containing many @ characters"
}

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.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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.

Action not permitted

pysec-2021-108

Vulnerability from pysec

CVE-2021-33503 (GCVE-0-2021-33503)

Vulnerability from cvelistv5

ghsa-q2q7-5pp4-w6pg

Vulnerability from github

Impact

Patches

References

For more information

Tags

Sightings

Nomenclature