GSD-2023-28835

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.
Aliases
Aliases

{
  "GSD": {
    "alias": "CVE-2023-28835",
    "id": "GSD-2023-28835"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-28835"
      ],
      "details": "Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.",
      "id": "GSD-2023-28835",
      "modified": "2023-12-13T01:20:46.772418Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2023-28835",
        "STATE": "PUBLIC"
      },
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                          "version_affected": "=",
                          "version_value": "\u003c 24.0.10"
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          }
        ]
      },
      "impact": {
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          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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                "value": "CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"
              }
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            "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9",
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        "discovery": "UNKNOWN"
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        "nodes": [
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                "versionEndExcluding": "25.0.4",
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              "value": "Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade."
            }
          ]
        },
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              "tags": [
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              "url": "https://github.com/nextcloud/server/pull/36093"
            },
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9",
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      "impact": {
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          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-04-07T15:02Z",
      "publishedDate": "2023-03-30T19:15Z"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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