cve-2023-28835
Vulnerability from cvelistv5
Published
2023-03-30 18:57
Modified
2024-08-02 13:51
Severity ?
EPSS score ?
Summary
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.
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
▼ | nextcloud | security-advisories |
Version: < 24.0.10 Version: >= 25.0.0, < 25.0.4 |
|
{ "containers": { "adp": [ { "providerMetadata": { "dateUpdated": "2024-08-02T13:51:38.590Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9", "tags": [ "x_refsource_CONFIRM", "x_transferred" ], "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9" }, { "name": "https://github.com/nextcloud/server/pull/36093", "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/nextcloud/server/pull/36093" } ], "title": "CVE Program Container" } ], "cna": { "affected": [ { "product": "security-advisories", "vendor": "nextcloud", "versions": [ { "status": "affected", "version": "\u003c 24.0.10" }, { "status": "affected", "version": "\u003e= 25.0.0, \u003c 25.0.4" } ] } ], "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-338", "description": "CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2023-03-30T18:57:00.487Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M" }, "references": [ { "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9" }, { "name": "https://github.com/nextcloud/server/pull/36093", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/nextcloud/server/pull/36093" } ], "source": { "advisory": "GHSA-7w2p-rp9m-9xp9", "discovery": "UNKNOWN" }, "title": "Insecure randomness for default password in nextcloud" } }, "cveMetadata": { "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2023-28835", "datePublished": "2023-03-30T18:57:00.487Z", "dateReserved": "2023-03-24T16:25:34.465Z", "dateUpdated": "2024-08-02T13:51:38.590Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "fkie_nvd": { "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*\", \"versionStartIncluding\": \"23.0.0\", \"versionEndExcluding\": \"23.0.14\", \"matchCriteriaId\": \"8C96D16D-F7EB-4674-A02A-FD5AC82CAC57\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*\", \"versionStartIncluding\": \"24.0.0\", \"versionEndExcluding\": \"24.0.10\", \"matchCriteriaId\": \"302FFA48-9204-4112-BF23-6182ED62F193\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*\", \"versionStartIncluding\": \"24.0.0\", \"versionEndExcluding\": \"24.0.10\", \"matchCriteriaId\": \"3D2D0CEB-437C-4ABA-9915-EFCB776E7ADC\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*\", \"versionStartIncluding\": \"25.0.0\", \"versionEndExcluding\": \"25.0.4\", \"matchCriteriaId\": \"282F04F1-B4E4-4DC2-82CA-55DB39A3F373\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*\", \"versionStartIncluding\": \"25.0.0\", \"versionEndExcluding\": \"25.0.4\", \"matchCriteriaId\": \"E14A1D06-7AB2-40C2-806F-7EE34595DAF7\"}]}]}]", "descriptions": "[{\"lang\": \"en\", \"value\": \"Nextcloud server is an open source home cloud implementation. 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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": "CVE-2023-28835", "lastModified": "2024-11-21T07:56:07.340", "metrics": "{\"cvssMetricV31\": [{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N\", \"baseScore\": 3.5, \"baseSeverity\": \"LOW\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.1, \"impactScore\": 1.4}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}", "published": "2023-03-30T19:15:07.020", "references": "[{\"url\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://github.com/nextcloud/server/pull/36093\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Issue Tracking\", \"Patch\"]}, {\"url\": \"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://github.com/nextcloud/server/pull/36093\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Issue Tracking\", \"Patch\"]}]", "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": "[{\"source\": \"security-advisories@github.com\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-338\"}]}]" }, "nvd": "{\"cve\":{\"id\":\"CVE-2023-28835\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2023-03-30T19:15:07.020\",\"lastModified\":\"2024-11-21T07:56:07.340\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Nextcloud server is an open source home cloud implementation. 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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.