pysec - pysec-2022-196

pysec-2022-196

Vulnerability from pysec

Published

2022-04-04 18:15

Modified

2022-05-17 23:28

Details

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one ends with "\x00" because there is no comparison of the length. A patch is available and expected to be part of the 0.3.2 release. There are currently no known workarounds.

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "vyper",
        "purl": "pkg:pypi/vyper"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2c73f8352635c0a433423a5b94740de1a118e508"
            }
          ],
          "repo": "https://github.com/vyperlang/vyper",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.0b1",
        "0.1.0b10",
        "0.1.0b11",
        "0.1.0b12",
        "0.1.0b13",
        "0.1.0b14",
        "0.1.0b15",
        "0.1.0b16",
        "0.1.0b17",
        "0.1.0b2",
        "0.1.0b3",
        "0.1.0b4",
        "0.1.0b5",
        "0.1.0b6",
        "0.1.0b7",
        "0.1.0b8",
        "0.1.0b9",
        "0.2.1",
        "0.2.10",
        "0.2.11",
        "0.2.12",
        "0.2.13",
        "0.2.14",
        "0.2.15",
        "0.2.16",
        "0.2.2",
        "0.2.3",
        "0.2.4",
        "0.2.5",
        "0.2.6",
        "0.2.7",
        "0.2.8",
        "0.2.9",
        "0.3.0",
        "0.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-24787",
    "GHSA-7vrm-3jc8-5wwm"
  ],
  "details": "Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one ends with `\"\\x00\"` because there is no comparison of the length. A patch is available and expected to be part of the 0.3.2 release. There are currently no known workarounds.",
  "id": "PYSEC-2022-196",
  "modified": "2022-05-17T23:28:35.497395Z",
  "published": "2022-04-04T18:15:00Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwm"
    }
  ]
}

ghsa-7vrm-3jc8-5wwm

Vulnerability from github

Published

2022-04-04 21:40

Modified

2022-04-06 17:39

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

Incorrect Comparison in Vyper

Details

Impact

bytestrings can have dirty bytes in them, resulting in the word-for-word comparison to give incorrect results, e.g. vyper b1: Bytes[32] = b"abcdef" b1 = slice(b1, 0, 1) b2: Bytes[32] = b"abcdef" t: bool = b1 == b2 # incorrectly evaluates to True even without dirty nonzero bytes, because there is no comparison of the length, two bytestrings can compare to equal if one ends with "\x00". vyper b1: Bytes[32] = b"abc\0" b2: Bytes[32] = b"abc" t: bool = b1 == b2 # incorrectly evaluates to True

Patches

fixed in https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "vyper"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-697"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-04-04T21:40:45Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nbytestrings can have dirty bytes in them, resulting in the word-for-word comparison to give incorrect results, e.g.\n```vyper\nb1: Bytes[32] = b\"abcdef\"\nb1 = slice(b1, 0, 1)\nb2: Bytes[32] = b\"abcdef\"\nt: bool = b1 == b2  # incorrectly evaluates to True\n```\neven without dirty nonzero bytes, because there is no comparison of the length, two bytestrings can compare to equal if one ends with `\"\\x00\"`.\n```vyper\nb1: Bytes[32] = b\"abc\\0\"\nb2: Bytes[32] = b\"abc\"\nt: bool = b1 == b2  # incorrectly evaluates to True\n```\n\n### Patches\nfixed in https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508",
  "id": "GHSA-7vrm-3jc8-5wwm",
  "modified": "2022-04-06T17:39:02Z",
  "published": "2022-04-04T21:40:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2022-196.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vyperlang/vyper"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incorrect Comparison in Vyper"
}

cve-2022-24787

Vulnerability from cvelistv5

Published

2022-04-04 17:35

Modified

2024-08-03 04:20

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one ends with `"\x00"` because there is no comparison of the length. A patch is available and expected to be part of the 0.3.2 release. There are currently no known workarounds.

References

▼	URL	Tags
	https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwm	x_refsource_CONFIRM
	https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

vyperlang

vyper

Version: <= 0.3.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T04:20:50.553Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwm"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "vyper",
          "vendor": "vyperlang",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 0.3.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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      "providerMetadata": {
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          "url": "https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508"
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      ],
      "source": {
        "advisory": "GHSA-7vrm-3jc8-5wwm",
        "discovery": "UNKNOWN"
      },
      "title": "Incorrect Comparison in Vyper",
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        },
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              {
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    "datePublished": "2022-04-04T17:35:10",
    "dateReserved": "2022-02-10T00:00:00",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

pysec-2022-196

Vulnerability from pysec

ghsa-7vrm-3jc8-5wwm

Vulnerability from github

Impact

Patches

cve-2022-24787

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature