CVE-2023-28835

Published Mar 30, 2023

Last updated 2 years ago

Overview

Description: 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.
Source: security-advisories@github.com
NVD status: Analyzed

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: HIGH

Weaknesses

security-advisories@github.com: CWE-338

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "8C96D16D-F7EB-4674-A02A-FD5AC82CAC57",
            "versionEndExcluding": "23.0.14",
            "versionStartIncluding": "23.0.0"
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "302FFA48-9204-4112-BF23-6182ED62F193",
            "versionEndExcluding": "24.0.10",
            "versionStartIncluding": "24.0.0"
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "3D2D0CEB-437C-4ABA-9915-EFCB776E7ADC",
            "versionEndExcluding": "24.0.10",
            "versionStartIncluding": "24.0.0"
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "282F04F1-B4E4-4DC2-82CA-55DB39A3F373",
            "versionEndExcluding": "25.0.4",
            "versionStartIncluding": "25.0.0"
          },
          {
            "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "E14A1D06-7AB2-40C2-806F-7EE34595DAF7",
            "versionEndExcluding": "25.0.4",
            "versionStartIncluding": "25.0.0"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Social media

Risk scores

CVSS 3.1

Weaknesses

Configurations

References