cve-2023-23931
Vulnerability from cvelistv5
Published
2023-02-07 20:54
Modified
2024-08-02 10:42
Summary
Cipher.update_into can corrupt memory in pyca cryptography
Impacted products
Vendor Product Version
Show details on NVD website


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    "cna": {
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          "product": "cryptography",
          "vendor": "pyca",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e=1.8, \u003c 39.0.1"
            }
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          "value": "cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8."
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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
            "version": "3.1"
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-754",
              "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
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      "providerMetadata": {
        "dateUpdated": "2023-02-07T20:54:03.628Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "source": {
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        "discovery": "UNKNOWN"
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      "title": "Cipher.update_into can corrupt memory in pyca cryptography"
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-23931",
    "datePublished": "2023-02-07T20:54:03.628Z",
    "dateReserved": "2023-01-19T21:12:31.360Z",
    "dateUpdated": "2024-08-02T10:42:27.102Z",
    "state": "PUBLISHED"
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