gsd-2021-42013
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
Aliases
Aliases
CVE-2021-42013


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-42013",
    "description": "It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration \"require all denied\", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.",
    "id": "GSD-2021-42013",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-42013.html",
      "https://advisories.mageia.org/CVE-2021-42013.html",
      "https://security.archlinux.org/CVE-2021-42013",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-42013.html",
      "https://packetstormsecurity.com/files/cve/CVE-2021-42013"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-42013"
      ],
      "details": "It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration \"require all denied\", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.",
      "id": "GSD-2021-42013",
      "modified": "2023-12-13T01:23:06.545548Z",
      "schema_version": "1.4.0"
    }
  },
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      "cveID": "CVE-2021-42013",
      "dateAdded": "2021-11-03",
      "dueDate": "2021-11-17",
      "product": "HTTP Server",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Apache HTTP server vulnerabilities allow an attacker to use a path traversal attack to map URLs to files outside the expected document root and perform Remote Code Execution.",
      "vendorProject": "Apache",
      "vulnerabilityName": "Apache HTTP Server 2.4.49 and 2.4.50 Path Traversal"
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      "credit": [
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          "value": "Reported by Juan Escobar from Dreamlab Technologies, Fernando Mu\u00f1oz from NULL Life CTF Team, and Shungo Kumasaka"
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              "refsource": "MLIST",
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            {
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              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/"
            },
            {
              "name": "[oss-security] 20211015 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
              "refsource": "MLIST",
              "tags": [
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              "url": "http://www.openwall.com/lists/oss-security/2021/10/15/3"
            },
            {
              "name": "[oss-security] 20211016 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)",
              "refsource": "MLIST",
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              "url": "http://www.openwall.com/lists/oss-security/2021/10/16/1"
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 6.4,
          "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": "2023-08-31T16:13Z",
      "publishedDate": "2021-10-07T16:15Z"
    }
  }
}


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