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.




{
   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",
      },
   ],
}


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