FKIE_CVE-2020-27790

Vulnerability from fkie_nvd - Published: 2022-08-18 19:15 - Updated: 2026-06-17 03:09
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
A floating point exception issue was discovered in UPX in PackLinuxElf64::invert_pt_dynamic() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading to a denial of service. The highest impact is to Availability.
References
secalert@redhat.comhttps://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26Patch, Third Party Advisory
secalert@redhat.comhttps://github.com/upx/upx/issues/331Exploit, Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/upx/upx/issues/331Exploit, Issue Tracking, Patch, Third Party Advisory
Impacted products
Vendor Product Version
upx upx *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "upx",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in v3.96."
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:upx:upx:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0C4F8C52-D021-4C5C-87B1-DF4B3BAD895B",
              "versionEndExcluding": "3.96",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A floating point exception issue was discovered in UPX in PackLinuxElf64::invert_pt_dynamic() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading to a denial of service. The highest impact is to Availability."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema de excepci\u00f3n de punto flotante en UPX en la funci\u00f3n PackLinuxElf64::invert_pt_dynamic() del archivo p_lx_elf.cpp. Un atacante con un archivo de entrada dise\u00f1ado podr\u00eda desencadenar este problema que podr\u00eda causar un fallo que conlleva una denegaci\u00f3n de servicio. El mayor impacto es la disponibilidad."
    }
  ],
  "id": "CVE-2020-27790",
  "lastModified": "2026-06-17T03:09:38.870",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-08-18T19:15:14.270",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/upx/upx/issues/331"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/upx/upx/commit/eb90eab6325d009004ffb155e3e33f22d4d3ca26"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/upx/upx/issues/331"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.