FKIE_CVE-2021-32839

Vulnerability from fkie_nvd - Published: 2021-09-20 17:15 - Updated: 2025-11-03 22:15
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of '\r\n' in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don't use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2.
References
security-advisories@github.comhttps://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aebPatch, Third Party Advisory
security-advisories@github.comhttps://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aebPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/12/msg00022.html
Impacted products
Vendor Product Version
sqlparse_project sqlparse *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sqlparse_project:sqlparse:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "77AA7C67-AD7E-4F5A-9F4D-577B7670EBE8",
              "versionEndExcluding": "0.4.2",
              "versionStartIncluding": "0.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of \u0027\\r\\n\u0027 in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don\u0027t use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2."
    },
    {
      "lang": "es",
      "value": "sqlparse es un m\u00f3dulo analizador de SQL no comprobable para Python. En las versiones 0.4.0 y 0.4.1 de sqlparse, se presenta una vulnerabilidad de Denegaci\u00f3n de Servicio por Expresi\u00f3n regular en sqlparse. La expresi\u00f3n regular puede causar un retroceso exponencial en las cadenas que contienen muchas repeticiones de \"\\r\\n\" en los comentarios SQL. S\u00f3lo la funci\u00f3n de formato que elimina los comentarios de las sentencias SQL esta afectada por esta expresi\u00f3n regular. Como soluci\u00f3n, no use la funci\u00f3n sqlformat.format con la palabra clave strip_comments=True o el indicador de l\u00ednea de comandos --strip-comments cuando use la herramienta de l\u00ednea de comandos sqlformat. Este problema ha sido corregido en sqlparse versi\u00f3n 0.4.2"
    }
  ],
  "id": "CVE-2021-32839",
  "lastModified": "2025-11-03T22:15:48.650",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2021-09-20T17:15:09.067",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aeb"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aeb"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00022.html"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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