CVE-2023-35927 (GCVE-0-2023-35927)

Vulnerability from cvelistv5 – Published: 2023-06-23 20:53 – Updated: 2024-11-07 18:29
VLAI?
Summary
NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, when two server are registered as trusted servers for each other and successfully exchanged the share secrets, the malicious server could modify or delete VCards in the system addressbook on the origin server. This would impact the available and shown information in certain places, such as the user search and avatar menu. If a manipulated user modifies their own data in the personal settings the entry is fixed again. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. A workaround is available. Remove all trusted servers in the "Administration" > "Sharing" settings `…/index.php/settings/admin/sharing`. Afterwards, trigger a recreation of the local system addressbook with the following `occ dav:sync-system-addressbook`.
Severity ?
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
nextcloud security-advisories Affected: Nextcloud Server >= 25.0.0, < 25.0.7
Affected: Nextcloud Server >= 26.0.0, < 26.0.2
Affected: Nextcloud Enterprise Server >= 25.0.0, < 25.0.7
Affected: Nextcloud Enterprise Server >= 26.0.0, < 26.0.2
Affected: Nextcloud Enterprise Server >= 21.0.0, < 21.0.9.12
Affected: Nextcloud Enterprise Server >= 22.0.0, < 22.2.10.12
Affected: Nextcloud Enterprise Server >= 23.0.0, < 23.0.12.7
Affected: Nextcloud Enterprise Server >= 24.0.0, < 24.0.12.2
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87\", \"name\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"https://github.com/nextcloud/server/pull/38247\", \"name\": \"https://github.com/nextcloud/server/pull/38247\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://hackerone.com/reports/1976754\", \"name\": \"https://hackerone.com/reports/1976754\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T16:37:40.519Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-35927\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-11-07T18:29:27.883306Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-11-07T18:29:32.527Z\"}}], \"cna\": {\"title\": \"Nextcloud system addressbooks can be modified by malicious trusted server\", \"source\": {\"advisory\": \"GHSA-h7f7-535f-7q87\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"nextcloud\", \"product\": \"security-advisories\", \"versions\": [{\"status\": \"affected\", \"version\": \"Nextcloud Server \u003e= 25.0.0, \u003c 25.0.7\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Server \u003e= 26.0.0, \u003c 26.0.2\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 25.0.0, \u003c 25.0.7\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 26.0.0, \u003c 26.0.2\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 21.0.0, \u003c 21.0.9.12\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 22.0.0, \u003c 22.2.10.12\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 23.0.0, \u003c 23.0.12.7\"}, {\"status\": \"affected\", \"version\": \"Nextcloud Enterprise Server \u003e= 24.0.0, \u003c 24.0.12.2\"}]}], \"references\": [{\"url\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87\", \"name\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/nextcloud/server/pull/38247\", \"name\": \"https://github.com/nextcloud/server/pull/38247\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://hackerone.com/reports/1976754\", \"name\": \"https://hackerone.com/reports/1976754\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, when two server are registered as trusted servers for each other and successfully exchanged the share secrets, the malicious server could modify or delete VCards in the system addressbook on the origin server. This would impact the available and shown information in certain places, such as the user search and avatar menu. If a manipulated user modifies their own data in the personal settings the entry is fixed again.\\n\\nNextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. A workaround is available. Remove all trusted servers in the \\\"Administration\\\" \u003e \\\"Sharing\\\" settings `\\u2026/index.php/settings/admin/sharing`. Afterwards, trigger a recreation of the local system addressbook with the following `occ dav:sync-system-addressbook`.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-284\", \"description\": \"CWE-284: Improper Access Control\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2023-06-23T20:53:33.688Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-35927\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-07T18:29:35.811Z\", \"dateReserved\": \"2023-06-20T14:02:45.593Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2023-06-23T20:53:33.688Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • 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.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.