gsd-2020-6096
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.
Aliases
Aliases
CVE-2020-6096


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-6096",
    "description": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.",
    "id": "GSD-2020-6096",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-6096.html",
      "https://ubuntu.com/security/CVE-2020-6096",
      "https://advisories.mageia.org/CVE-2020-6096.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-6096"
      ],
      "details": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.",
      "id": "GSD-2020-6096",
      "modified": "2023-12-13T01:21:55.019398Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2020-6096",
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      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "GNU glibc",
                    "version": {
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                          "version_value": "2.30.9000"
                        }
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              },
              "vendor_name": "n/a"
            }
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          }
        ]
      },
      "impact": {
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          "baseSeverity": "High",
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      },
      "problemtype": {
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                "value": "CWE-195: Signed to Unsigned Conversion Error"
              }
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      },
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    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
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            "operator": "OR"
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          {
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          {
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      },
      "cve": {
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          "ID": "CVE-2020-6096"
        },
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "value": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data."
            }
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            },
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        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2022-11-21T19:39Z",
      "publishedDate": "2020-04-01T22:15Z"
    }
  }
}


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