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Vulnerability Details :

CVE-2023-28835

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-30 Mar, 2023 | 18:57
Updated At-11 Feb, 2025 | 18:50
Rejected At-
Credits

Insecure randomness for default password in nextcloud

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:30 Mar, 2023 | 18:57
Updated At:11 Feb, 2025 | 18:50
Rejected At:
▼CVE Numbering Authority (CNA)
Insecure randomness for default password in nextcloud

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.

Affected Products
Vendor
Nextcloud GmbHnextcloud
Product
security-advisories
Versions
Affected
  • < 24.0.10
  • >= 25.0.0, < 25.0.4
Problem Types
TypeCWE IDDescription
CWECWE-338CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Type: CWE
CWE ID: CWE-338
Description: CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Metrics
VersionBase scoreBase severityVector
3.13.5LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Version: 3.1
Base score: 3.5
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9
x_refsource_CONFIRM
https://github.com/nextcloud/server/pull/36093
x_refsource_MISC
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/nextcloud/server/pull/36093
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9
x_refsource_CONFIRM
x_transferred
https://github.com/nextcloud/server/pull/36093
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/nextcloud/server/pull/36093
Resource:
x_refsource_MISC
x_transferred
2. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:30 Mar, 2023 | 19:15
Updated At:07 Apr, 2023 | 15:02

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Secondary3.13.5LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 3.5
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CPE Matches

Nextcloud GmbH
nextcloud
>>nextcloud_server>>Versions from 23.0.0(inclusive) to 23.0.14(exclusive)
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Nextcloud GmbH
nextcloud
>>nextcloud_server>>Versions from 24.0.0(inclusive) to 24.0.10(exclusive)
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
Nextcloud GmbH
nextcloud
>>nextcloud_server>>Versions from 24.0.0(inclusive) to 24.0.10(exclusive)
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Nextcloud GmbH
nextcloud
>>nextcloud_server>>Versions from 25.0.0(inclusive) to 25.0.4(exclusive)
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
Nextcloud GmbH
nextcloud
>>nextcloud_server>>Versions from 25.0.0(inclusive) to 25.0.4(exclusive)
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Weaknesses
CWE IDTypeSource
CWE-338Primarysecurity-advisories@github.com
CWE ID: CWE-338
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9security-advisories@github.com
Vendor Advisory
https://github.com/nextcloud/server/pull/36093security-advisories@github.com
Issue Tracking
Patch
Hyperlink: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9
Source: security-advisories@github.com
Resource:
Vendor Advisory
Hyperlink: https://github.com/nextcloud/server/pull/36093
Source: security-advisories@github.com
Resource:
Issue Tracking
Patch

Change History

0
Information is not available yet

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