cve-2024-32481
Vulnerability from cvelistv5
Published
2024-04-25 17:00
Modified
2024-08-02 02:13
Summary
vyper's range(start, start + N) reverts for negative numbers
Impacted products
vyperlangvyper
Show details on NVD website


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              "cpe:2.3:a:vyperlang:vyper:0.3.8:*:*:*:*:python:*:*"
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            "product": "vyper",
            "vendor": "vyperlang",
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                "status": "affected",
                "version": "0.3.8",
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                "id": "CVE-2024-32481",
                "options": [
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                    "Exploitation": "poc"
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                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-29T19:03:15.836132Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:51:33.592Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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            "url": "https://github.com/vyperlang/vyper/commit/3de1415ee77a9244eb04bdb695e249d3ec9ed868"
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        "title": "CVE Program Container"
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    "cna": {
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          "product": "vyper",
          "vendor": "vyperlang",
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          "value": "Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. Starting in version 0.3.8 and prior to version 0.4.0b1, when looping over a `range` of the form `range(start, start + N)`, if `start` is negative, the execution will always revert. This issue is caused by an incorrect assertion inserted by the code generation of the range `stmt.parse_For_range()`. The issue arises when `start` is signed, instead of using `sle`, `le` is used and `start` is interpreted as an unsigned integer for the comparison. If it is a negative number, its 255th bit is set to `1` and is hence interpreted as a very large unsigned integer making the assertion always fail. Any contract having a `range(start, start + N)` where `start` is a signed integer with the possibility for `start` to be negative is affected. If a call goes through the loop while supplying a negative `start` the execution will revert. Version 0.4.0b1 fixes the issue."
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
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            "privilegesRequired": "NONE",
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              "description": "CWE-681: Incorrect Conversion between Numeric Types",
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        "advisory": "GHSA-ppx5-q359-pvwj",
        "discovery": "UNKNOWN"
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      "title": "vyper\u0027s range(start, start + N) reverts for negative numbers"
    }
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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-32481",
    "datePublished": "2024-04-25T17:00:54.082Z",
    "dateReserved": "2024-04-12T19:41:51.168Z",
    "dateUpdated": "2024-08-02T02:13:39.300Z",
    "state": "PUBLISHED"
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  }
}


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