Vulnerability-Lookup

CVE-2020-8231 (GCVE-0-2020-8231)

Vulnerability from cvelistv5 – Published: 2020-12-14 19:39 – Updated: 2024-08-04 09:56

Summary

Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-416 - Use After Free (CWE-416)

Assigner

hackerone CNA under the mitre root

CNA scorecard D 59/100 over 192 records in the last 180 days details

References

8 references

URL	Tags
https://hackerone.com/reports/948876	x_refsource_MISC
https://curl.haxx.se/docs/CVE-2020-8231.html	x_refsource_MISC
https://security.gentoo.org/glsa/202012-14	vendor-advisoryx_refsource_GENTOO
https://www.debian.org/security/2021/dsa-4881	vendor-advisoryx_refsource_DEBIAN
https://lists.apache.org/thread.html/rf4c02775860…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r58af02e294b…	mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	https://github.com/curl/curl	Affected: libcurl 7.29.0 to and including 7.71.1

Show details on NVD website

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To clipboard

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}

GSD-2020-8231

Vulnerability from gsd - Updated: 2023-12-13 01:21

Details

Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

Aliases

CVE-2020-8231

Aliases

CVE-2020-8231

JSON

To clipboard

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            ],
            "url": "https://security.gentoo.org/glsa/202012-14"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4881"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          }
        ],
        "sourceIdentifier": "support@hackerone.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "support@hackerone.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}

ICSA-22-069-09

Vulnerability from csaf_cisa - Published: 2022-03-08 00:00 - Updated: 2025-05-06 06:00

Summary

Siemens SINEC INS

Scope

71 vulnerabilities in this advisory, including CVE-2020-8231.

CVE-2020-8231

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

Known affected: 1 product

https://support.industry.siemens.com/cs/ww/en/view/109806100/

Open the full advisory

ICSA-23-348-10

Vulnerability from csaf_cisa - Published: 2023-12-12 00:00 - Updated: 2025-08-12 00:00

Summary

Siemens SIMATIC S7-1500

Scope

544 vulnerabilities in this advisory, including CVE-2020-8231.

CVE-2020-8231

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

Known affected: 5 products

https://support.industry.siemens.com/cs/ww/en/view/109478459/

Open the full advisory

MSRC_CVE-2020-8231

Vulnerability from csaf_microsoft - Published: 2020-12-02 00:00 - Updated: 2020-12-17 00:00

Summary

Due to use of a dangling pointer libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

Scope

1 vulnerability in this advisory, including CVE-2020-8231.

CVE-2020-8231

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OESA-2021-1004 (CVE-2020-8231)

Vulnerability from osv_openeuler – Published: 2021-02-04 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

curl security update

Details

cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.\r\n\r\n Security Fix(es):\r\n\r\n Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.(CVE-2020-8231)\r\n\r\n curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verification of the OCSP response.(CVE-2020-8286)\r\n\r\n curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.(CVE-2020-8285)\r\n\r\n A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service banner extractions.(CVE-2020-8284)\r\n\r\n

Severity

3.7 (Low)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-8231	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-8286	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-8285	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-8284	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "curl-7.71.1-5.oe1.aarch64.rpm",
          "curl-debugsource-7.71.1-5.oe1.aarch64.rpm",
          "libcurl-devel-7.71.1-5.oe1.aarch64.rpm",
          "libcurl-7.71.1-5.oe1.aarch64.rpm",
          "curl-debuginfo-7.71.1-5.oe1.aarch64.rpm",
          "curl-debuginfo-7.71.1-4.oe1.aarch64.rpm",
          "libcurl-7.71.1-4.oe1.aarch64.rpm",
          "curl-debugsource-7.71.1-4.oe1.aarch64.rpm",
          "libcurl-devel-7.71.1-4.oe1.aarch64.rpm",
          "curl-7.71.1-4.oe1.aarch64.rpm"
        ],
        "noarch": [
          "curl-help-7.71.1-5.oe1.noarch.rpm",
          "curl-help-7.71.1-4.oe1.noarch.rpm"
        ],
        "src": [
          "curl-7.71.1-5.oe1.src.rpm",
          "curl-7.71.1-4.oe1.src.rpm"
        ],
        "x86_64": [
          "curl-debugsource-7.71.1-5.oe1.x86_64.rpm",
          "libcurl-7.71.1-5.oe1.x86_64.rpm",
          "curl-debuginfo-7.71.1-5.oe1.x86_64.rpm",
          "curl-7.71.1-5.oe1.x86_64.rpm",
          "libcurl-devel-7.71.1-5.oe1.x86_64.rpm",
          "curl-7.71.1-4.oe1.x86_64.rpm",
          "libcurl-7.71.1-4.oe1.x86_64.rpm",
          "libcurl-devel-7.71.1-4.oe1.x86_64.rpm",
          "curl-debuginfo-7.71.1-4.oe1.x86_64.rpm",
          "curl-debugsource-7.71.1-4.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS",
        "name": "curl",
        "purl": "pkg:rpm/openEuler/curl\u0026distro=openEuler-20.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.71.1-4.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "curl-debuginfo-7.71.1-4.oe1.aarch64.rpm",
          "libcurl-7.71.1-4.oe1.aarch64.rpm",
          "curl-debugsource-7.71.1-4.oe1.aarch64.rpm",
          "libcurl-devel-7.71.1-4.oe1.aarch64.rpm",
          "curl-7.71.1-4.oe1.aarch64.rpm"
        ],
        "noarch": [
          "curl-help-7.71.1-4.oe1.noarch.rpm"
        ],
        "src": [
          "curl-7.71.1-4.oe1.src.rpm"
        ],
        "x86_64": [
          "curl-7.71.1-4.oe1.x86_64.rpm",
          "libcurl-7.71.1-4.oe1.x86_64.rpm",
          "libcurl-devel-7.71.1-4.oe1.x86_64.rpm",
          "curl-debuginfo-7.71.1-4.oe1.x86_64.rpm",
          "curl-debugsource-7.71.1-4.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "curl",
        "purl": "pkg:rpm/openEuler/curl\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.71.1-4.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "cURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.\\r\\n\\r\\n\r\nSecurity Fix(es):\\r\\n\\r\\n\r\nDue to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.(CVE-2020-8231)\\r\\n\\r\\n\r\ncurl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verification of the OCSP response.(CVE-2020-8286)\\r\\n\\r\\n\r\ncurl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.(CVE-2020-8285)\\r\\n\\r\\n\nA malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service banner extractions.(CVE-2020-8284)\\r\\n\\r\\n",
  "id": "OESA-2021-1004",
  "modified": "2026-08-06T11:04:13Z",
  "published": "2021-02-04T11:04:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1004"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8231"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8286"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8285"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8284"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "curl security update",
  "upstream": [
    "CVE-2020-8231",
    "CVE-2020-8286",
    "CVE-2020-8285",
    "CVE-2020-8284"
  ]
}

OPENSUSE-SU-2020:1345-1

Vulnerability from csaf_opensuse - Published: 2020-09-05 12:23 - Updated: 2026-09-20 19:12

Summary

Security update for curl

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-8231.

CVE-2020-8231

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Recommended: 14 products

Open the full advisory

OPENSUSE-SU-2020:1359-1

Vulnerability from csaf_opensuse - Published: 2020-09-07 08:27 - Updated: 2026-09-20 19:12

Summary

Security update for curl

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-8231.

CVE-2020-8231

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Recommended: 8 products

Open the full advisory

OPENSUSE-SU-2020:1494-1

Vulnerability from csaf_opensuse - Published: 2020-09-21 10:30 - Updated: 2026-09-20 19:13

Summary

Security update for curl

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-8231.

CVE-2020-8231

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Recommended: 14 products

Open the full advisory

OPENSUSE-SU-2024:10582-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2026-09-20 20:01

Summary

curl-7.79.1-1.1 on GA media

Severity

Moderate

Scope

48 vulnerabilities in this advisory, including CVE-2020-8231.

CVE-2020-8231

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Recommended: 20 products

Open the full advisory

RHSA-2021:1610

Vulnerability from csaf_opensuse - Published: 2021-05-18 00:00 - Updated: 2026-09-20 11:14

Summary

security update for curl

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2020-8231.

CVE-2020-8231

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Recommended: 7 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2020-8231 (GCVE-0-2020-8231)

OESA-2021-1004 (CVE-2020-8231)

Tags

Sightings

Nomenclature

Related by attack behaviour