GSD-2020-14343

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.
Aliases
Aliases

{
  "GSD": {
    "alias": "CVE-2020-14343",
    "description": "A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.",
    "id": "GSD-2020-14343",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-14343.html",
      "https://access.redhat.com/errata/RHSA-2021:4702",
      "https://access.redhat.com/errata/RHSA-2021:2583",
      "https://ubuntu.com/security/CVE-2020-14343",
      "https://advisories.mageia.org/CVE-2020-14343.html",
      "https://security.archlinux.org/CVE-2020-14343",
      "https://linux.oracle.com/cve/CVE-2020-14343.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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        "CVE-2020-14343"
      ],
      "details": "A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.",
      "id": "GSD-2020-14343",
      "modified": "2023-12-13T01:22:00.419772Z",
      "schema_version": "1.4.0"
    }
  },
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                    "version": {
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                          "version_value": "PyYAML 5.4"
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          }
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    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=5.1,\u003c5.4",
          "affected_versions": "All versions starting from 5.1 before 5.4",
          "cvss_v2": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-20",
            "CWE-937"
          ],
          "date": "2021-09-29",
          "description": "A vulnerability was discovered in the PyYAML library, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the `full_load` method or with the `FullLoader` loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the `python/object/new` constructor. This flaw is due to an incomplete fix for CVE-2020-1747.",
          "fixed_versions": [
            "5.4"
          ],
          "identifier": "CVE-2020-14343",
          "identifiers": [
            "CVE-2020-14343"
          ],
          "not_impacted": "All versions before 5.1, all versions starting from 5.4",
          "package_slug": "pypi/PyYAML",
          "pubdate": "2021-02-09",
          "solution": "Upgrade to version 5.4 or above.",
          "title": "Improper Input Validation",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-14343",
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          "uuid": "ef6843ae-ccfb-4ba7-9c9b-65310b620cd2"
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      "cve": {
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 10.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-07-06T18:15Z",
      "publishedDate": "2021-02-09T21:15Z"
    }
  }
}


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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • 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.


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