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CVE-2021-36976

Full vulnerability record from the local CVENow database.

Description

libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).

Severity
MEDIUM
CVSS score
6.5 (v3.1)
Vulnerability status
Modified
Source identifier
Published
2021-07-20 07:15:07.950000
Last modified
2026-11-02 19:17:43.830000
View original CVE JSON
{
  "id": "CVE-2021-36976",
  "sourceIdentifier": "[email protected]",
  "published": "2021-07-20T07:15:07.950",
  "lastModified": "2026-11-02T19:17:43.830",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block)."
    },
    {
      "lang": "es",
      "value": "libarchive versiones 3.4.1 hasta 3.5.1, presenta un uso de memoria previamente liberada en la función copy_string (llamado desde do_uncompress_block y process_block)"
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
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        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
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        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    "ssvcV203": [
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          "timestamp": "2026-10-08T20:58:40.752723Z",
          "id": "CVE-2021-36976",
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            {
              "exploitation": "none"
            },
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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      "type": "Primary",
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          "lang": "en",
          "value": "CWE-416"
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