FKIE_CVE-2021-43099

Vulnerability from fkie_nvd - Published: 2022-03-28 22:15 - Updated: 2024-11-21 06:28
Severity ?
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Summary
An Archive Extraction (AKA "Zip Slip) vulnerability exists in bbs 5.3 in the UpgradeNow function in UpgradeManageAction.java, which unzips the arbitrary upladed zip file without checking filenames. The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe).
References
cve@mitre.orghttps://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
Impacted products
Vendor Product Version
diyhi bbs 5.3
To clipboard 

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      "nodes": [
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          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:diyhi:bbs:5.3:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Archive Extraction (AKA \"Zip Slip) vulnerability exists in bbs 5.3 in the UpgradeNow function in UpgradeManageAction.java, which unzips the arbitrary upladed zip file without checking filenames. The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe)."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de extracci\u00f3n de archivos (tambi\u00e9n se conoce como \"Zip Slip\") en bbs versi\u00f3n 5.3, en la funci\u00f3n UpgradeNow en el archivo UpgradeManageAction.java, que descomprime el archivo zip arbitrario subido sin comprobar los nombres de los archivos. La vulnerabilidad es explotada usando un archivo especialmente dise\u00f1ado que contiene nombres de archivo de navegaci\u00f3n de directorios (por ejemplo, ../../evil.exe)"
    }
  ],
  "id": "CVE-2021-43099",
  "lastModified": "2024-11-21T06:28:40.710",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 4.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "version": "2.0"
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        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
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          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2022-03-28T22:15:09.350",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://github.com/diyhi/bbs/issues/51"
    },
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  "vulnStatus": "Modified",
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          "value": "CWE-22"
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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 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.



Detection rules are retrieved from Rulezet.